Haier MRV 5-RC AB052MAERA, Service Manual

Page: 174 / 243

171
Digital
tube
indication
on master
unit
Failure code definition Failure description Remarks
39-1
Compression ratio too
high
Protection
After compressor is running
，
compression ratio ε
＞
10.0
forcontinuous 5 minutes
，
stop and alarm
。
2 minutess and 50
Seconds later
，
resume automatically
。
If it occurs 4 times in
an hour
，
confirm the failure
。
Once
confirmation
un-resumable
40
High pressure sensor Pd
too high protection
If Pd≥4.15MPa
，
alarm and stop
，
2 minutes and 50 seconds
later
，
resume automatically
。
If it occurs 3 times in an hour
，
confirm the failure
。
Once
confirmation
un-resumable
43-0
Discharging temp.
sensor Tdi too low
protection
In normal operation,If Td
＜
CT+10
℃
for continuous 5
minutes
，
the unit stops and alarms.2 minutes and 50 seconds
later,resume automatically.If it occurs 3 times in an hour,confirm
the failure.
Once
confirmation
un-resumable
43-1
Discharging temp.
sensor Td1 too low
protection
45
Communication failure
between outdoors
Continuous 30 seconds no communication
resumable
46-0
Communication failure
with INV1 module board Continuous 30 seconds no communication
46-1
Communication failure
with INV2 module board Continuous 30 seconds no communication
46-4
Communication with fan
1 module board
Continuous 30 seconds no communication
46-5
Communication with fan
2 module board
Continuous 30 seconds no communication
47
Communication failure
with wireless module
Wireless module can not detect 2 minutes alarm
51-0
LEVa1 over current
protection
LEV drive chip detection resumable
51-1
LEVa2 over current
protection
LEV drive chip detection resumable
52-0
LEVa1 disconnection
fault
LEV drive chip detection resumable
52-1
LEVa2 disconnection
fault
LEV drive chip detection resumable
74 Emergency stop
External interface control(The machine will stop quickly after
switch cut off)
resumable
75-0
High and low pressure
difference is too small
Pd-Ps = 0.35Mpa for 3 minutes, if the outdoor protective stop.
Protect stop after 5 minutes, then restart.
Once
confirmation
un-resumable
76-0
Incorrect outdoor
address or capacity
setting
The number of sub machine and host data does not match the
EEPROM set
Reset 76-1
The address of sub machine and host data does not match the
EEPROM set
76-2
The capacity setting of sub machine and host data does not
match the EEPROM set
83
Incorrect parameter
setting or incorrect
match of outdoor unit
Outdoor machine type dial code settings error or with the host
model does not match
Non
recoverable
99-X Program self fault X=0~5 resumable