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31-5000573 Rev. 2 43
ENGLISH
INSTALLATION INSTRUCTIONS
Failure Codes
Digital tube
indication on
main unit
Failure code definition Failure description Remarks
108 Module rectifier-side software
transient overcurrent
–
0: compressor module 1;
1: compressor module 2;
-4: fan module 1;
-5: fan module 2;
Four fault confirmed for
one hour,
Once confirmed
un-resumable
109 Module rectifier-side current
detection circuit anomaly
–
110 Module hardware overcurrent –
111 Compressor out of step The rotor position can not be detected 6 times in a row
while starting or running, and the INV control board is
automatically restored after stopping 5 s.
112 Module heat sink over temperature The temperature more than 201 °F(94 °C) fault alarm.
Automatic recovery of INV control board when
temperature is 201 °F(94 °C)
113 Module overload –
114 Inverter input power abnormal P/N voltage<420V, alarm
P/N voltage>420V, auto recovery
P/N voltage>642V, alarm
P/N voltage<642V, auto recovery
Iverter input power voltage sags and brief
interruptions
115 Module DC bus DC overvoltage When the supply voltage is greater than DC642V, the
fault alarm. When the voltage is less than DC642V, the
INV control board is automatically restored.
116 Communication error between
module and control board
For 30 s, the communication signal is not detected, and
the INV control board is recovered immediately after
detection.
117 Modular software overcurrent –
118 Module boot failure Compressor 5 consecutive start failure.
119 Module current detection circuit error Abnormality of current detection sensor, no connection
or connection error.
120 Module power supply error Inverter controller power supply instantaneous
interrupt.
121 Module control board power supply
abnormal
Inverter controller board power supply instantaneous
interrupt.
122 Module radiator temperature sensor
abnormal
Temperature sensor resistance is abnormal or not
connected.
123 Module rectifer side hardware
transient overcurrent
–
124 Three phase power supply failure –
125-0/1 Compressor frequency mismatch The current frequency is greater than or equal to INV or
+3Hz target frequency target actual frequency > 0 & & =
0 for 5 minutes
Resumable
125-4/5 Fan speed mismatch (locked rotor) 20 rpm run below the 30 s, or the target value of 70% to
run for up to 2 minutes after the shutdown, automatic
recovery after 2 minutes and 50 s, one hour and four
fault confirmed.
Once confirmed
un-resumable
127 MCU reset fault If the host detects sub machine MCU reset, and the
machine is in operation, the host MCU reset the fault,
the whole system down; if in the heating mode, then
restart the 4WV power, the system re 4WV reversing
operation. Four fault confirmed for one hour
Once confirmed
un-resumable
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