Haier AD482MPERA - Page 255

254
LD indication
on master
unit
Indication
on wired
controller
(hex)
Failure code definition Failure description Remarks
45 2D
Communication among
outdoors
failure
No communication within 3 minutes continuously Resumable
46 2E
Communication with
inverter module failure
No communication within 30 seconds continuously Resumable
75-0 4B
No pressure drop between
high pressure and low
pressure
In 1min after inverter compressor starts up, Pd-Ps≤0.1MPa.
Resume automatically after 170 secs. Four times an hour,
failure confirmed.
Once confirmation,
Unresumable
75-0 4B
No pressure drop between
high pressure and low
pressure
In 1min after inverter compressor starts up, Pd-Ps≤0.1MPa.
Resume automatically after 170 secs. Four times an hour,
failure confirmed.
Once confirmation,
Unresumable
75-4 4B
Small drop between high
pressure and low pressure
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.
Once confirmation,
Unresumable
76-0 4C
Incorrect outdoor qty,
address and capacity
setting
Slave unit qty setting is not in conformance with indoor
EEPROM data
Reset76-1 4C
Slave unit address setting is not in conformance with indoor
EEPROM data
76-2 4C
Slave unit HP setting is not in conformance with indoor
EEPROM data
77 4D
Oil equalization protection
among outdoors
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.
Once confirmation,
Unresumable
78-0 4E
Refrigerant shortage alarm
in cooling
Compressor running in cooling mode, Ps<0.1MPa continues
for 30 mins
--
78-1 4F
Refrigerant shortage alarm
in heating
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.