Haier MRV 5-RC VP1-112B Service Manual page 174

Digital
tube
indication Failure code definition
on master
unit
Compression ratio too
39-1 high
Protection
High pressure sensor Pd
40
too high protection
Discharging temp.
43-0 sensor Tdi too low
protection
Discharging temp.
43-1 sensor Td1 too low
protection
Communication failure
45
between outdoors
Communication failure
46-0
with INV1 module board
Communication failure
46-1
with INV2 module board
Communication with fan
46-4
1 module board
Communication with fan
46-5
2 module board
Communication failure
47
with wireless module
LEVa1 over current
51-0
protection
LEVa2 over current
51-1
protection
LEVa1 disconnection
52-0
fault
LEVa2 disconnection
52-1
fault
74 Emergency stop
High and low pressure
75-0
difference is too small
76-0
Incorrect outdoor
76-1 address or capacity
setting
76-2
Incorrect parameter
83 setting or incorrect
match of outdoor unit
99-X Program self fault
Failure description
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。
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。
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.
Continuous 30 seconds no communication
Continuous 30 seconds no communication
Continuous 30 seconds no communication
Continuous 30 seconds no communication
Continuous 30 seconds no communication
Wireless module can not detect 2 minutes alarm
LEV drive chip detection
LEV drive chip detection
LEV drive chip detection
LEV drive chip detection
External interface control(The machine will stop quickly after
switch cut off)
Pd-Ps = 0.35Mpa for 3 minutes, if the outdoor protective stop.
Protect stop after 5 minutes, then restart.
The number of sub machine and host data does not match the
EEPROM set
The address of sub machine and host data does not match the
EEPROM set
The capacity setting of sub machine and host data does not
match the EEPROM set
Outdoor machine type dial code settings error or with the host
model does not match
X=0~5
171
Remarks
Once
confirmation
un-resumable
Once
confirmation
un-resumable
Once
confirmation
un-resumable
resumable
resumable
resumable
resumable
resumable
resumable
Once
confirmation
un-resumable
Reset
Non
recoverable
resumable