Haier MRV II - Page 72

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digital
tube
indication
on
master
unit
indication
on wired
controller
(hex)
failure code definition failure description
35
23
inner thermal protector
circuit of master unit
compressor failure
inner thermal
protector of master
unit compressor
acts
37 25
wrong wiring for master
unit high/low pressure
sensor Pd,Ps
after compressor
startup for 3
minutes, Pd is
lower than Ps for 1
minute
40 28
master unit high
pressure sensor Pd
protection
Pd is over
28.5kgG/cm² for 30
seconds
43 2B
master unit low
frequency air
discharging temp.
sensor Td protection
running frequency
of inverter
compressor is
below 30Hz, Td is
over 110ºC for 10
minutes
44 2C
communication between
master unit main chip
538 and chip
807(indoor) failure
no communication
for 4 minutes
45 2D
communication between
master unit main chip
538 and chip
807(central
communication) failure
no communication
for 4 minutes
46 2E
communication between
master unit connecting
board and inverter board
failure
communication is
abnormal for 2
minutes after being
electrified
49 31
driving chip EEPROM
on master unit inverter
board failure
EEPROM faulty, or
being inserted
conversely, with
incorrect part
Part 2