Haier AV10IMWEWA Design, Installation & Maintenance Instruction page 255

Indication
LD indication
on wired
on master
controller
unit
(hex)
45 2D
46 2E
75-0 4B
75-0 4B
75-4 4B
76-0 4C
76-1 4C
76-2 4C
77 4D
78-0 4E
78-1 4F
Failure code definition
Communication among
outdoors
failure
Communication with
inverter module failure
No pressure drop between
high pressure and low
pressure
No pressure drop between
high pressure and low
pressure
Small drop between high
pressure and low pressure
Incorrect outdoor qty,
address and capacity
setting
Oil equalization protection
among outdoors
Refrigerant shortage alarm
in cooling
Refrigerant shortage alarm
in heating
Failure description
No communication within 3 minutes continuously
No communication within 30 seconds continuously
In 1min after inverter compressor starts up, Pd-Ps≤0.1MPa.
Resume automatically after 170 secs. Four times an hour,
failure confirmed.
In 1min after inverter compressor starts up, Pd-Ps≤0.1MPa.
Resume automatically after 170 secs. Four times an hour,
failure confirmed.
If Pd-Ps≤0.4MPa continues for 3 mins, this outdoor will be
stopped for protection.
Restart in 5 mins after the protection stop.
If the protection stop occurs over 6 times in two hours,
Error stop.
Slave unit qty setting is not in conformance with indoor
EEPROM data
Slave unit address setting is not in conformance with indoor
EEPROM data
Slave unit HP setting is not in conformance with indoor
EEPROM data
ToilpB-ToilpA≤10°C, unit alarms and stops. No detection
in and 10 mins after the startup, defrosting and oil return
control. Resume automatically after 170 secs. Two times an
hour, failure confirmed.
Compressor running in cooling mode, Ps<0.1MPa continues
for 30 mins
Compressor running in heating mode, Ts1-ET>20 & Ts1-
ET>20 & LEV are fully opened for 60 mins. Alarm signal is
output without stopping the unit.
254
Remarks
Resumable
Resumable
Once confirmation,
Unresumable
Once confirmation,
Unresumable
Once confirmation,
Unresumable
Reset
Once confirmation,
Unresumable
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