Haier MRV5 - Failure Code; Outdoor Unit Failure Codes

25
Failure code
Failure code
The outdoor unit failure code table
Failure code
display on
the outdoor
digital display
board
Failure code
denition
Failure code denition Remarks
20-0
Defrosting temp.
sensor (Te) failure
Continuous disconnect for 60 seconds or
short circuit, failure alarm
Resumable
21
Ambient temp.
sensor (Ta) failure
Continuous disconnect for 60 seconds or
short circuit, failure alarm
Resumable
22
Suction temp.
sensor (Ts) failure
Continuous disconnect for 60 seconds or
short circuit, failure alarm
Resumable
23
Discharge temp.
sensor (Td) failure
Continuous disconnect for 60 seconds or
short circuit, failure alarm
Resumable
26-0
Communication
failure with indoor
units
No indoor units connection can be detected
for continuous 200 cycles.
Resumable
26-1
It was detected that the number of indoor
units was less than the set number for 300
seconds.
Resumable
26-2
It was detected that the number of indoor
units was more than the set number for 300
seconds.
Resumable
28
Discharge pressure
sensor (Pd) failure
Continuous disconnect for 60 seconds or
short circuit, failure alarm.
Resumable
29
Suction pressure
sensor (Ps) failure
Continuous disconnect for 60 seconds or
short circuit, failure alarm.
Resumable
30
High pressure
switch (HPS) failure
When the high pressure switch is
disconnected, failure alarm. When the high
pressure switch is closed, failure removed.
Failure is locked if it occurs 3 times in one
hour.
Once failure
locked, un-
resumable.
33 EEPROM failure Oudoor unit EEPROM failure
Un-
resumable
34
Discharge temp. too
high (Td)
Td≥[115]°C,failure alarm; Td≤[85]°C,failure
removed. Failure is locked if it occurs 3 times
in one hour.
Once failure
locked, un-
resumable
35
4-way valve
revering failure
After the compressor starts, it runs
continuously for 10 minutes, if the four-
way valve does not reverse failure alarm.
The failure will be removed after 3 minutes.
Failure is locked if it occurs 3 times in one
hour.
Once failure
locked, un-
resumable