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INSTALLATION INSTRUCTIONS
Failure Codes
Digital tube
Failure code definition
indication on
main unit
108
Module rectifier-side software
transient overcurrent
109
Module rectifier-side current
detection circuit anomaly
110
Module hardware overcurrent
111
Compressor out of step
112
Module heat sink over temperature
113
Module overload
114
Inverter input power abnormal
115
Module DC bus DC overvoltage
116
Communication error between
module and control board
117
Modular software overcurrent
118
Module boot failure
119
Module current detection circuit error Abnormality of current detection sensor, no connection
120
Module power supply error
121
Module control board power supply
abnormal
122
Module radiator temperature sensor
abnormal
123
Module rectifer side hardware
transient overcurrent
124
Three phase power supply failure
125-0/1
Compressor frequency mismatch
125-4/5
Fan speed mismatch (locked rotor)
127
MCU reset fault
49-5000878 Rev. 0
Failure description
–
–
–
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.
The temperature more than 201 °F(94 °C) fault alarm.
Automatic recovery of INV control board when
temperature is 201 °F(94 °C)
–
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
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.
For 30 s, the communication signal is not detected, and
the INV control board is recovered immediately after
detection.
–
Compressor 5 consecutive start failure.
or connection error.
Inverter controller power supply instantaneous
interrupt.
Inverter controller board power supply instantaneous
interrupt.
Temperature sensor resistance is abnormal or not
connected.
–
–
The current frequency is greater than or equal to INV or
+3Hz target frequency target actual frequency > 0 & & =
0 for 5 minutes
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.
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
Remarks
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
Resumable
Once confirmed
un-resumable
Once confirmed
un-resumable
45
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