Haier MRV II - Page 74

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digital
tube
indication
on
master
unit
indication
on wired
controller
(hex)
failure code
definition
failure description
77(7) 4D
the slave unit oil
temp. sensor
Toil failure
sensor is below -60.87
(open circuit) or over
135.4 (short circuit)
for 1 minute
78(8) 4E
the slave unit
E²PROM failure
EEPROM faulty or
being inserted
conversely, with
incorrect part
79(9) 4F
the slave unit
sensor Ps
failure
high pressure 4.9V, or
below 0.1V for 30
seconds
79(9) 4F
the slave unit
sensor Ps
failure
high pressure 4.9V, or
below 0.1V for 30
seconds
80(10) 50
the slave unit
discharging
temp. Td
protection
response
Td sensor is over
120ºC for 10 seconds,
when below 100ºC,
resumable
82(11) 52
communication
between the
slave unit and
connecting
board failure
communication
abnormal for 1 minute
and alarm
83(12) 53
the slave unit
high pressure
switch
protection
switch opens for 1
minute, alarm; switch
close for 1 minute,
resumable
84(14) 54
the slave unit
low pressure
switch
protection
switch opens for 1
minute, alarm; switch
close for 1 minute,
resumable
86(16) 56
the slave unit oil
temp. is too
high
oil temp. is over 80
for 10 minutes,
resumable
87(17) 57
the slave unit oil
temp. is too low
in operation,
compressor oil temp. is
below (Ps＋10) ºC for
5 minutes, resumable
Part 2