Haier MRV II - Page 71

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digital
tube
indication
on
master
unit
indication
on wired
controller
(hex)
failure code
definition
failure description
28 1C
master unit high
pressure
sensor Pd
failure
high pressure over
4.9V, or below 0.1V
for 30 seconds, resume
manually then turn to
backup running
29 1D
master unit low
pressure
sensor Ps
failure
high pressure over
4.9V, or below 0.1V
for 30 seconds, resume
manually then turn to
backup running
30 1E
master unit high
pressure switch
failure
the switch open for 1
minute, alarm, switch
closes for 1 minute,
resume
31 1F
master unit low
pressure switch
failure
the switch open for 1
minute, alarm, switch
closes for 1 minute,
resume
32 20
master unit IPM
module
protection
input from chip 840 on
inverter board
33 21
EEPROM
failure of master
unit main chip
538
EEPROM faulty, or
being inserted
conversely, with
incorrect part
34 22
master unit
discharging
temp. Td
protection
Td sensor is over 125ºC
for 10 seconds, when
below 100ºC,
resumable
Part 2