Haier MRV II - Page 73

- 74 -
digital
tube
indication
on master
unit
indication
on wired
controller
(hex)
failure code
definition
failure description
54 36
master unit oil
temp. is too
low
in operation,
compressor oil temp. is
below (Ps＋10)ºC for 5
minutes, resumable
69 45
slave unit is
missing in
operation
in operation, slave unit
communication is
abnormal, or slave unit
is powered off
70 46
system lack of
refrigerant
the failure only is
displayed, no protection
occurs
71（1） 47
lack of phase
or incorrect
phase
sequence
72（2） 48
compressor
over current
protection
73（3） 49
the slave unit
defrosting
temp. sensor
Te failure
sensor temp. is below
-60.87 (open circuit)
or over 135.4（short
circuit）for 1 minute
74(4) 4A
the slave unit
ambient temp.
sensor Ta
failure
sensor temp. is below
-60.87 (open circuit)
or over 135.4（short
circuit）for 1 minute
75(5) 4B
the slave unit
suction temp.
sensor Ts
failure
sensor temp. is below
-60.87 (open circuit)
or over 135.4（short
circuit）for 1 minute
76(6) 4C
the slave unit
discharging
temp. sensor
Td failure
after compressor runs
for 5 minutes, the
sensor temp. is below
-4.45(open circuit) or
over 337.14 (short
circuit) for 1 minute