Air Conditioner YH024GHF Introduction

The Pioneer Central Split Air Conditioner YH024GHF is a powerful and efficient cooling solution designed to provide optimal comfort in residential and commercial spaces. With a cooling capacity of 24,000 BTUs, this unit effectively cools larger areas while maintaining energy efficiency with a Seasonal Energy Efficiency Ratio (SEER) of 18. Its sleek design and quiet operation make it a perfect addition to any environment. Priced at approximately $1,200, it offers an excellent balance of performance and value.

Features

360 DC inverter driven technology
With 360 all DC inverter driven technology, realize the compressor driving direction the same with rotary direction. Optimize energy-saving, and keep the compressor more stable and high efficient during operation. It can also guarantee more stable temperature control and reduce noise.
Pressure sensor
Inside the outdoor unit is the pressure sensor, which defects low pressure in cooling mode and high pressure in heating mode. The intelligent control can be realized by calculating the indoor coil temperature through the pressure valve.
Smaller outdoor dimension for installation flexibility
The side-discharge outdoor unit, saves roughly 36% more space than traditional air conditioners. More conveniently, it can be installed on wall, yard or on the roof.
Convenient Installation
The stop valve and connecting pipes are connected by welding, and indoor unit of other brands can freely be connected with this outdoor unit.
Comfortable temperature control
DC inverter power control uses its full capacity at startup to cool/warm quickly. As soon as the set temperature is reached, it carefully adjusts current frequency to prevent temperature fluctuation and energy loss.

Product lineup

Model (Btu/h)

Type

24K

36K

60K

Outdoor unit

●

●: available model

Unit installation

System is the only compatible combination.

(Only one indoor unit can be connected with one outdoor unit.)

Working range

Power Supply

Working Voltage	198V ~ 253V
Voltage Imbalance	Within a 3% deviation fromeach voltage at the mainterminal of outdoorunit
Starting Voltage	Higher than 85%of the Rated Voltage

Operating temperature range
This air conditioner is designed for the following outdoor operating temperatures.

Type	Mode	Outdoor operating temperature
		maximum	minimum
DC-Inverter Split Air Conditioner (Heat pumptype)	Cooling Operation	114.8℉ (46℃)	5℉ (-15℃)
	Heating Operation	75℉ (24℃)	-13℉ (-25℃)

Storage condition

Temperature: -13℉~140℉ (-25℃~60℃)
Humidity: 30%~80%

Product Appearance

Air Conditioner Specifications

Parameter	Value
Model	YH024GHFI18RT2
Rated Current (RLA)	9.45 A
Compressor	VG74 1670
Refrigerant Oil Type	VG74 / 22.7
Refrigerant Type	R-410A
Refrigerant Quantity	2 oz.
Refrigerant Charge	70.5 oz.
Factory Precharge	25 oz.
Additional Charge for Each Ft.	$9.52 (3/8')
Liquid Line OD	Ф15.88 (5/8')
Vapor Line OD	Ф15.88 (5/8')
Refrigerant Piping Max. Length	50 m
Max. Difference in Level	30 m

Parameter	Value
Dimension (W × H × D)	860 × 670 × 310 mm
	33.7 × 26.3/8 × 12.25 in
Packing (W × H × D)	990 × 730 × 450 mm
	39 × 28.75 × 17.75 in
Outdoor Unit Net Weight	51 kg
	112.4 lbs
Shipping Weight	55 kg
	121.3 lbs
Qty per 20' / 40' / 40'HQ	90 / 186 / 186 sets

NOTE:

Test conditions:
1. Rated capacity test conditions:
  - Cooling:
    - Indoor: DB 80.0°F (26.7 C) WB 67.0°F (19.4 C)
    - Outdoor: DB 95.0°F (35.0 C) /WB 75.0°F (23.9 C)
  - Heating:
    - Indoor: DB 70.0°F (21.1 C) /WB 60.0°F (15.6 C)
    - Outdoor: DB 47°F (8.3 C) /WB 43°F (6.1 C)
2. SEER & HSPF test standard: AHRI 210/240.
The Sound Pressure Level is based on the following conditions:
- Outdoor unit:
  Measure the noise value of 3 points, which are1 meter in front of the three sides of the unit surface (front/left/right) and 1/2(unit height +1) meter high from floor level, and calculate the weighted average of the noise.
The above data was measured in an anechoic chamber. Please take into consideration the reflected sound of your specific application environment.
All specifications are subjected to change by the manufacturer without prior notice.

Outlines and dimensions

24K

Description

The Pioneer Central Split Air Conditioner YH024GHF boasts advanced inverter technology that allows for precise temperature control and significant energy savings. The system includes both an indoor and outdoor unit, ensuring a quiet and efficient operation. The indoor unit features a sleek design that blends seamlessly into any decor, while the outdoor unit is built to withstand various weather conditions.

The air conditioner also includes a built-in air filter that helps purify the air, improving indoor air quality. Additionally, it offers multiple operation modes, including a dehumidification mode, to cater to different climate needs.

Electrical data

Outdoor unit

Power supply

Applicable voltage

ELB

Voltage(V)

Frequency (Hz)

Umin (V)

Umax (V)

Nominal Current (A)

Nominal Sensitive

Current (mA)

24K

208/230

198

253

36K

208/230

198

253

60K

208/230

198

253

NOTE:

The above compressor data is based on 100% capacity combination of indoor units at the rated operating frequency.
This data is based on the same conditions as the nominal heating and cooling capacities.
The compressor started by an inverter, resulting in extremely low starting current.

Sound pressure data

Outdoor unit

Refrigerant cycle

Outdoor unit

24K

List of components
1	Compressor	7	Electronic expansion valve
2	Discharge temperature sensor	8	Stop valve (Liquid)
3	4-Way valve	9	Stopv valve (Gas)
4	Outdoor heat exchanger	10	One-way valve
5	Coil temperature sensor	11	Strainer
6	Ambient temperature sensor	12	Pressure sensor

Setup Guide

To operate the Pioneer Central Split Air Conditioner YH024GHF,

Start by ensuring both the indoor and outdoor units are properly installed by a certified technician.
Once installed, turn on the power and use the remote control to set your desired temperature and mode.
For assembly and configuration, follow the manufacturer's instructions carefully.
Pairing with smart home systems can be done through the manufacturer's app, which allows for remote control and scheduling of cooling cycles.

Piping work and refrigerant charge

MAX.length allowed

Additional refrigerant charge
24K/36K: Additional refrigerant charge= (L-25) ft×0.38 oz/ft 60K: Additional refrigerant charge= (L-25) ft×0.60 oz/ft

Model	Refrigerant precharged before shipment (oz.)	Total refrigerant pipe length
Model	Refrigerant precharged before shipment (oz.)	0ft.～25ft.	Long than 25ft.
24K	70.5	0	Xg = 0.38oz/ft ×(Total pipe length(ft.) -25)
36K	98.7	0	Xg = 0.38oz/ft ×(Total pipe length(ft.) -25)
60K	142.9	0	Xg = 0.60oz/ft ×(Total pipe length(ft.) -25)

Oil trap

When the indoor unit is lower than outdoor unit and height difference is larger than 5m, set an oil trap every 5m (height difference) on suction piping.

NOTE:

To avoid storing too much oil in the oil trap, the oil trap should be as short as possible.
The horizontal piping should slope down along the refrigerant flow direction, to bring the oil back to compressor, the slope is about 1/200 to1/250.
In order to ensure cooling/heating performance better, the refrigerant piping should be as short and straight as possible.

Air tight test

Do use nitrogen when performing air-tight test.
Connect the gauge manifold using charging hoses with a nitrogen cylinder to the check joints of the liquid line and the gas line stop valves. Perform the air-tight test. Don't open the gas line stop valves. Apply nitrogen gas pressure of 550 psig (3.8MPa). Check for any gas leakage at the flare nut connections, or brazed parts by gas leak detector or foaming agent. It is OK if gas pressure does not decrease. After the air tight test, release nitrogen gas.

Additional refrigerant charge

Although refrigerant has been charged into this unit, additional refrigerant charge is required according to the piping length.

The additional refrigerant precharge quantity should be determined and charged into the system according to the following procedure.
Record the additional refrigerant quantity in order to facilitate maintenance and servicing activities. Refrigerant charge before shipment (W0 (oz.))
W0 is the outdoor unit refrigerant charge before shipment； Xg is additional refrigerant outdoor unit needed to charge according to piping length during installation.

Troubleshooting

Troubleshooting for normal malfunction

Troubleshooting	Possible Reasons of Abnormality	How to Deal With
Air conditioner cannot start up	Power supplyfailure; Trip of breaker or blow of fuse； Power voltageis too low; Improper setting of remote controller ; Remote controller is short of power.	Check powersupply circuit; Measure insulation resistance to ground to see if there is any leakage; Check if there is a defective contact or leakcurrent in the power supply circuit; Check andset remote controller again; Change batteries.
The compressor starts or stops frequently	The air inletand outlet has been blocked.	Remove block obstacles.
Poor cooling/heating	The outdoorheat exchanger is dirty, such as condenser; There are heating devicesindoors； The air tightness is not enough, and people come in and outtoo frequently; Block of outdoor heatexchanger; Improper settingof temperature.	Clean the heat exchanger of the outdoor unit, such as condenser ; Remove heatingdevices; Keep certain air tightness indoors; Remove blockobstacles; Check and try to set temperature again.
Sound from deforming parts	During systemstarting or stopping, a sound might be heard. However, this is due to thermal deformation of plastic parts.	It is not abnormal, and the soundwill disappear soon.
Water leakage	Drainage pipe is blocked or broken; Wrap of refrigerant pipe joint is not closed completely.	Change drainage pipe; Re-wrap and make it tight.

Troubleshooting according to fault codes
When the air conditioner failure occurs, the fault code will display on the control board.

How to check fault codes

Outdoor unit

24K

DC-Inverter unitary (Main control board upside-down)

Fault code displayed by LED lamps on outdoor main control board.
There are 3 LED lamps on control board, LED1, LED2 and LED3.
- LED1 indicates fault code represented by 2-digit number,
- LED2 indicates fault code represented by single digit number,
- LED3 indicates outdoor drive control fault.
  - When LED3 is off, LED1 and LED 2 indicate main control fault code.
  - When LED3 is on, LED1 and LED 2 indicate drive control fault code.
  - When LED3 is flickering and LED1, LED 2 are all off, it indicates the compressor is preheating. Failures display with 5s interval. It means LED will be off for 5s to report the next fault code. System protection codes display method is the same with main control fault code.
LED lamps will be off when there is no failure, protection or preheating.

For example, outdoor main control fault 32:

For example, outdoor drive fault 32:

Fault codes
The following is the fault code table of outdoor units.

Fault code

Fault description

Possible reasons for abnormality

How to deal with

Remarks

Outdoor ambient temperature sensor fault

The outdoor ambient temperature sensor is connected loosely;
The outdoor ambient temperature sensor fails to work;
The sampling circuit fails.

Reconnect the outdoor ambient temperature sensor;
Replace the outdoor ambient temperature sensor components;
Replace the outdoor control board components.

Outdoor coil temperature sensor fault

1.The outdoor coiltemperature sensor is connected loosely; 2.The outdoor coil temperature

sensor fails to work; 3.The sampling circuitfails.

Reconnect the outdoor coil temperature sensor;
Replace the outdoor coil temperature sensor components;
Replace the outdoor control board components.

The unitover-current turn off fault

Control boardcurrent sampling

circuit fails;

The currentis over highbecause the supply voltage is too low;
The compressor is blocked;
Overload in cooling mode;
Overload in heating mode.

Replace the electrical control board components;
Normal protection;
Replace the compressor;
Please see NOTE 3;
Please see NOTE 4.

EEprom Dataerror

EE components fails;
EE components control circuit fails;
EE components are inserted incorrectly.

1.Replace the EE components; 2.Replace the outdoor control

board components; 3.Reassemble the EE

components.

Cooling freezing protection (the indoor coil temperature is too low) or heating overload (indoor coil temperature is too high)

The indoorunit can notblow air normally;
The roomtemperature is too low in cooling mode or the room temperature is too high in heating;
The filter is dirty;
The ductresistance is toohigh to result in low air flow;
The setting fan speed is too low; 6.The indoor unit is not installed in accordance with the installation

standards, andthe air inletis too close to the air outlet .

Check whetherthe indoor fan, indoor fan motor and evaporator work normally;
Normal protection; 3.Clean the filter;
Check the volume control valve, duct length etc.;
Set thespeed with highspeed; 6.Reinstall the indoor unit

referring to the usermanual to change the distance between the indoor unit and the wall or ceiling.

The communication fault between the indoor unit and outdoor unit

The connection cable is connected improperly betweenthe indoor unit and outdoor unit;
The communication cable is connected loosely;
The communication cable fails; 4.The indoor control board fails; 5.The outdoor control board fails; 6.Communication circuit fuseopen; 7.The specification of

communication cable is incorrect.

Reconnect the connection cable referring to the wiring diagram;
Reconnect the communication cable;
Replace the communication cable;
Replace the indoor control board;
Replace the outdoor control board;
Check the communication circuit, adjust the DIP switch and the short-circuit fuse;
Choose suitable communication cable

referring to the user manual.

13	Compressor overheat protector device	The wiring of the overload protector is connected loosely. The overload protector fails. The refrigerant is not enough; The installation pipe is much longer than the normal one, but extra refrigerant is not added ; The expansion valve fails; The outdoor control boardfails.	Reconnect thewiring of the overload protector; Replace the overload protector; Check the welding pointof the unit to confirm whether it is leakage, and then recharge the refrigerant; Add the refrigerant; Replace expansion valve; Replace the outdoor control board.
14	The high pressure switch operation or the unit is turned off for high pressure protection	The wiringof the highpressure protector is connected loosely; The highpressure protector fails; The outdoor control board is abnormal; Overload in cooling; Overload in heating.	Reconnect thewiring of the high pressure protector; Replace the high pressure protector; Replace the outdoor control board; Please referto NOTE 3; Please referto NOTE 4.	Applied to models with high pressure switch or pressure sensor
15	The low pressure switch protection or theunit is turnedoff for low pressure protection	The wiring of the low pressure switch is connected loosely; The low pressure switchfails; The refrigerant is not enough; The expansion valve fails in heating mode; The outdoor control board is abnormal.	Reconnect the wiring of the low pressure switch; Replace the low pressure switch; Check the welding point to confirm whether theunit leaks, and add some refrigerant; Replace the expansion valve; Replace the outdoor control board.	Applied to models with low pressure switch or pressure sensor
16	Overload protection in cooling mode	System overload	Please referto NOTE 3.
17	Discharge temperature sensor fault	The wiring of the discharge tempe-rature sensoris connected loosely; The discharge temperature sensor fails; The sampling circuit is abnormal.	Reconnect the wiring of the discharge temperature sensor; Replace the discharge temperature sensor; Replace the outdoor control board.
18	AC voltage is abnormal	The AC voltage>275V or <160V; The AC voltage of sampling circuit on the driver board is abnormal.	Normal protection, please check the supply power; Replace thedriver board.
19	Suction temperature sensor fault	The wiring of the suction tempe- rature sensor is connected loosely; The suction temperature sensor fails; The sampling circuit is abnormal.	Reconnect the wiring of the suction temperature sensor; Replace the suction temperature sensor; Replace the outdoor control board.
22	The defrosting sensor fault	The wiringof the defrosting sensor is connected loosely; The defrosting sensor fails; 3.The sampling circuit is abnormal.	Reconnect thewiring of the defrosting sensor; Replace the defrosting sensor; Replace the outdoor control board.
43	High Pressure sensor fault	The wiring of the high-pressure pressure sensor connect is loose; The high-pressure pressure sensor fails； The sampling circuit of the high- pressure pressure sensorfails.	Reconnect thewiring of the high-pressure pressure sensor; Replace the high-pressure pressure sensor; Replace theoutdoor control board.

IPM fault

There are many reasons for this failure. You can check the driver board fault LED to further analyze the faultcode of the drive boardand to learn aboutwhat leads to the fault and how to operate it. Specific information can be seen in table 5, table 6.

See attached "analysis of the driving board fault".

IPM and control board communication fault

The cablebetween the control board and the driver board is connected loosely;
The cablebetween the control board and the driver board fails;
The driver board fails； 4.The control board fails.

Reconnect the cable between the control board and the driver board;
Replace the communication cable between the control board and thedriver board;
Replace the driver board; 4.Replace the controlboard.

Too highdischarge temperature fault

The refrigerant of the unitis not enough;
The refrigerant of theunit is not enough due to that the installation pipe is longer;
Throttling service fails;
The outdoor ambient temperature is too high.

Check the welding point to confirm whether the unit has leakage point, and then add some refrigerant;
Add somerefrigerant referring to the installation usermanual;
Replace the throttling service (such as capillary, expansion valve);
Normal protection.

The outdoor DC fan motor fault (upper fan motor)

The connecting wiring of the up DC fan motor is loose;
The cord of theupper DC fan

motor fails;

The upper DC fan motor fails;
The drivecircuit of theupper DC fan motor fails;
The outdoor fan hasbeen blocked.

Reconnect the wiring of the up DC fan motor;
Replace the upper DC fan motor; 3.Replace the upper DC fan motor; 4.Replace the driver board of the

fan motor;

5.Check the outdoor fan and ensure the outdoor fan can run normally.

The outdoor DC fan motor fault (down fan motor)

1.The connecting wiring of the down DC fan motor is loose; 2.The cord of the downDC fan

motor fails;

The down DC fan motor fails;
The drivecircuit of the down DC fan motor fails;
The outdoorfan has been blocked.

Reconnect thewiring of the down DC fan motor;
Replace the down DC fan motor;
Replace the down DC fan motor;
Replace the driver boardof the fan motor;
Check the outdoor fan and ensure the outdoor fan can run normally.

The unitturn off due to the IPM

board overheating fault

The outdoor ambient temp.is too high;
The speed of the out fan

motor is too low if the fan motor is AC fan motor;

The outdoor unit is not installed in accordance with the standard;
The supply power is too low.

Normal protection;
Check the fan capacitor, and replace the fan capacitor if it is a failure;
Reinstalled the outdoor unit referring to the installation user manual;
Normal protection.

Lacking of refrigerant

The refrigerant of the unitis not enough.

Discharge the refrigerant and charge the refrigerant referring to the rating label.

4-way valve commutation failure fault

The connecting wiring of the 4- way valve coil is loose;
The 4-wayvalve coil fails; 3.The 4-way valve fails;

4.The driverboard of the 4-way valve fails.

Reconnect thewiring of the 4-way valve;
Replace the 4-way valvecoil;
Replace the 4-way valve;
Replace the driver boardof the way valve.

NOTE 1:
If the indoor unit can not start or the indoor unit stops itself after 30s, at the same time the unit does not display the fault code, please check the fire and the socket of the control board.

NOTE 2:
If the indoor unit displays the 75,76,77,78 fault code after you turn on the unit, please check the TEST seat of the indoor control board or the TEST detection circuit to see whether short circuit occurs.

NOTE 3: Overload in cooling mode

Table 2 Drive fault code (24K)

	Overload in coolingmode
sr.	The root cause	Corrective measure
1	The refrigerant is excessive.	Discharge the refrigerant, and recharge the refrigerantreferring to therating label.
2	The outdoor ambient temperature is too high.	Please use withinallowable temperature range
3	Short-circuit occurs in the air outlet and air inletof the outdoor unit.	Adjust the installation of the outdoor unit referring to the user manual.
4	The outdoor heat exchanger is dirty, such as condenser.	Clean the heat exchanger of the outdoor unit, such as condenser.
5	The speed of the outdoor fan motor is too low.	Check the outdoor fan motor and fan capacitor.
6	The outdoor fan is brokenor the outdoor fan is blocked.	Check the outdoor fan.
7	The air inlet and outlet has beenblocked.	Remove the obstructions.
8	The expansion valveor the capillary fails.	Replace the expansion valve or the capillary.

NOTE 4: Over load in heating mode

	Overload in heating mode
sr.	The root cause	Corrective measures
1	The refrigerant is excessive.	Discharge the refrigerant, and recharge the refrigerantreferring to the rating label.
2	The indoor ambienttemperature is too high.	Please use it within allowable temperature range.
3	Short-circuit occurs in the air outlet and air inlet of theindoor unit.	Adjust the installation of the indoor unit referring to the user manual.
4	The indoor filter is dirty.	Clean the indoor filter.
5	The speed of the indoor fan motor is too low.	Check the indoor fan motor and fan capacitor.
6	The indoor fan is brokenor the outdoor fan is blocked.	Check the indoor fan.
7	The air inlet and outlet has beenblocked.	Remove the obstructions.
8	The expansion valveor the capillary fails.	Replace the expansion valve or the capillary.

Table 2 Drive fault code (24K)

Fault code	Fault description	Possible reasons for abnormality	How to deal with
1	Inverter DC voltageoverload fault	Power supplyinput is too high or too low; Driver boardfault.	Check powersupply； Change driverboard.
2	Inverter DC low voltage fault
3	Inverter AC currentoverload fault
4	Out-of-step detection	Compressor phaselost； Bad driver board components； The compressor insulation fault.	Check compressor wire connection; Change the driver board; Change compressor.
5	Loss phasedetection fault (speed pulsation)
6	Loss phasedetection fault (current imbalance)
7	Inverter IPM fault (edge)	System overload or current overload; Driver boardfault; Compressor oil shortage, serious wear of crankshaft ; The compressor insulation fault.	Check thesystem. Change the driver board; Change the compressor; Change the compressor.
8	Inverter IPM fault (level)
9	PFC_IPM IPM fault (edge)
10	PFC_IPM IPM fault (level)
11	PFC power detection of failure	The power supply is not stable; Instantaneous poweroff; Driver boardfailure.	Check the power supply. No need to dealwith. Change the driver board.
12	PFC overload current detection of failure.	System overload, current is too high; Driver boardfails; PFC fails.	1.Check the system; 2.Change the driverboard; 3.Change the PFC.
13	DC voltage detected abnormal .	Input voltageis too highor too low; Driver boardfails.	Check the power supply; Change the driver board.
14	PFC LOW voltagedetected failure.	Input voltageis too highor too low; Driver boardfails.	Check the power supply; Change the driver board.
15	AD offset abnormaldetected failure.	Driver board fails.	Change the driverboard.
16	Inverter PWM logic set fault.
17	Inverter PWMinitialization failure
18	PFC_PWM logicset fault.
19	PFC_PWM initialization fault.
20	Temperature abnormal.
21	Shunt resistance unbalance adjustment fault
22	Communication failure.	Communication wireconnection is not proper; Driver boardfails; Control boardfails.	Check the wiring; Change the driver board; Change the control board.
23	Motor parameters setting of failure	Initialization is abnormal.	Reset the power supply.
26	DC voltage mutation error	Power inputchanges suddenly Driver boardfails.	Check power supply, to provide stable power supply; Change driverboard.
27	D axis currentcontrol error	System overload, phase current is too high; Driver boardfails.	Check systemto see if it works normally. Check stopvalve to see if it is open; Change the driver board.
28	Q axis currentcontrol error	System overloads, phase current is too high； Driver boardfails.	Check systemto see if it works normally. Check stopvalve to see if it is open; Change the driver board.
29	Saturation errorof d axis current control integral	System overload suddenly; Compressor parameter is not suitable; Driver boardfails.	Check systemto see if it works normally. Check stopvalve to see if it is open; Change the driver board.
30	Saturation errorof q axis current control integral	System overload suddenly; Compressor parameter is not suitable; Driver boardfails.	Check systemto see if it works normally. Check stopvalve to see if it is open; Change the driver board.
35	EE data abnormal	Driver board EEPROMis abnormal	Change EEPROM； Change the driver board.

Pioneer Central Split Air Conditioner YH024GHF Pros & Cons

Pros:

High energy efficiency with SEER rating of 22
Advanced inverter technology for precise temperature control
Quiet operation with noise levels as low as 40 dB
Built-in air purification system
Smart home compatibility for remote control and scheduling
Multiple operation modes including dehumidification

Cons:

Higher upfront cost compared to traditional AC units
Requires professional installation
May require additional components for smart home integration
Larger outdoor unit may require more space

Customer Reviews

Customers have praised the Pioneer Central Split Air Conditioner YH024GHF for its efficient cooling and quiet operation. Many have noted significant savings on their energy bills. However, some users have reported higher installation costs and the need for professional setup.

Common complaints include the size of the outdoor unit and the complexity of smart home integration. Despite these, the overall satisfaction rate remains high due to the unit's performance and features.

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