Failure Code - Haier MRV5 Installation Manual

Failure code

Failure code
The outdoor unit failure code table
Failure code
display on
Failure code
the outdoor
digital display
board
Defrosting temp.
20-0
sensor (Te) failure
Ambient temp.
21
sensor (Ta) failure
Suction temp.
22
sensor (Ts) failure
Discharge temp.
23
sensor (Td) failure
26-0
Communication
26-1
failure with indoor
units
26-2
Discharge pressure
28
sensor (Pd) failure
Suction pressure
29
sensor (Ps) failure
High pressure
30
switch (HPS) failure
33 EEPROM failure
Discharge temp. too
34
high (Td)
4-way valve
35
revering failure
definition
Continuous disconnect for 60 seconds or
short circuit, failure alarm
Continuous disconnect for 60 seconds or
short circuit, failure alarm
Continuous disconnect for 60 seconds or
short circuit, failure alarm
Continuous disconnect for 60 seconds or
short circuit, failure alarm
No indoor units connection can be detected
for continuous 200 cycles.
It was detected that the number of indoor
units was less than the set number for 300
seconds.
It was detected that the number of indoor
units was more than the set number for 300
seconds.
Continuous disconnect for 60 seconds or
short circuit, failure alarm.
Continuous disconnect for 60 seconds or
short circuit, failure alarm.
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.
Oudoor unit EEPROM failure
Td≥[115]°C,failure alarm; Td≤[85]°C,failure
removed. Failure is locked if it occurs 3 times
in one hour.
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.
Failure code definition
25
Remarks
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
Resumable
Once failure
locked, un-
resumable.
Un-
resumable
Once failure
locked, un-
resumable
Once failure
locked, un-
resumable