Airdach ACTH2418VG1-D, Technical Manual

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R410A 17.5 SEER Inverter Split System Technical Manual
9. Troubleshooting
9.1 Compressor driver chip
The compressor driver chip controls 2 LED lights, namely red light and green light, and the
meaning of the fault light display is as follows
：
* The flashing frequency is 2.5Hz, and display of fault code is based on the actual protection time.
9.2 Troubleshooting of sensor
Cooling mode:
Sensor Operation mode in case of failure
T3
The maximum operating temperature shall not exceed 140
℉
T4 Operate at T4 = 122°F
TP Operate at T4 = 122°F for T4 temperature frequency limiting and current frequency limiting
Heating mode:
Sensor Operation mode in case of failure
T3
T4 <45°F: After 40 minutes of continuous operation, the compressor is forced to defrost once, and
the defrosting time is 3 minutes.
T4 >=45°F: After 90 minutes of continuous operation, the compressor is forced to defrost once, and
the defrosting time is 2 minutes.
T4 Operate at T4 = 59°F
TP
Operate at T4 = 59°F for T4 temperature frequency limiting and current frequency limiting
Expansion valve operates at Tp = 266 °F
Failure Green light Red light
DC bus voltage over/low protection (MCE failure) ON ON
Normal standby ON OFF
EEPROM fault ON FLASH
Normal operation OFF ON
Compressor stall protection OFF FLASH
Phase protection, zero speed protection, synchronous fault FLASH ON
IGBT overcurrent or module protection FLASH OFF
Communication failure (host data cannot be received for 1min) FLASH FLASH