Panasonic U-8MF2E8 - Page 53

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3WAY SYSTEM
Control Functions
1
12. Backup Operation
12-1-2. Start of Automatic Backup Operation
If the above alarms occur, the alarm is displayed on the remote controller etc.
Pressing the remote controller button again starts automatic backup mode.
When the backup operation is started, operation just before the automatic backup can only be worked.
In the case of all cooling mode or mixed condenser operation, cooling and fan operation can only be worked and
heating thermostat is turned OFF.
In the case of all heating mode or mixed evaporator operation, heating and fan operation can only be worked and
cooling thermostat is turned OFF.
12-1-3. Backup Operation Information Display
* Backup operation caused by an alarm listed in “alarm list 2” will finish automatically after 24 hours if the same
alarm does not occur again for 24 hours.
A : When there is one outdoor unit in the system, only compressor that has sensor failure stops.
When there are multiple outdoor units in the system, the outdoor unit which contains the problem stops.
B : When there is one outdoor unit in the system, the backup operation does not work.
When there are multiple outdoor units in the system, the outdoor unit which contains the problem stops.
Alarm list 2 (Backup operation continues as long as the problem doesn't solve)
Alarm display
Discharge temperature sensor failure for compressor 1
Discharge temperature sensor failure for compressor 2
Gas temperature sensor in heat exchanger 1
Liquid temperature sensor in heat exchanger 1
Ambient air temperature
BSuction temperature
Temp. sensor at refrigerant gas outlet of dual-tube
High pressure sensor failure
A
A
B
B
B
B
B
F05
F04
F06
F08
F07
F12
F16
F14
Low pressure sensor failure
Gas temperature sensor in heat exchanger 2
Liquid temperature sensor in heat exchanger 2
Compressor 1 discharge temperature sensor disconnected
Oil temperature sensor 1 (Inverter compressor)
ACompressor 2 CT sensor disconnected or short-circuit
Compressor 2 discharge temperature sensor disconnected
Oil temperature sensor 2 (Constant-speed compressor 1)
B
B
B
A
A
A
A
F23
F17
F24
H08
H05
H13
H27
H15
Compressor 1 discharge temperature trouble
Compressor 2 discharge temperature trouble A
A
P17
P03
If a wired remote controller is present, display blinks during operation.
SM830226-003WAYECO-iSYSTEM.in4545SM830226-003WAYECO-iSYSTEM.in4545 2013/02/1311:52:292013/02/1311:52:29