Haier MRV5-H - Page 93

90
Digital Tube
Indication
on Main Unit
Failure Code Denition Failure Description Remarks
108
Module rectier-side software
transient overcurrent
–
0: compressor
module 1;
1: compressor
module 2;
-4: fan module 1;
-5: fan module 2;
Four fault
conrmed for
one hour,
Once conrmed
un-resumable
109
Module rectier-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 conrmed.
Once conrmed
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 conrmed for one hour
Once conrmed
un-resumable