Backup Operation - Panasonic U-8ME1E81 Service Manual

12. Backup Operation

12. Backup Operation
12-1. Automatic Backup Operation
This system includes a function for automatic backup operation.
An alarm is displayed on the remote controller to inform the user that a failure has occurred.
12-1-1. Alarms That Result in Automatic Backup Operation
When the following alarm occurs, automatic backup operation is engaged.
Automatic backup operation is not engaged in cases of serious alarm such as communications alarms, etc.
Alarm list 1 (Backup operation continues unless power supply of all outdoor units is turned off.)
Alarm display
H01 Over-current of compressor 1
H03 Compressor 1 CT sensor disconnected or short-circuit
H11 Over-current of compressor 2
H12 Lock current of compressor 2
H21
Over-current of compressor 3
H22 Lock current of compressor 3
H31 HIC trouble for compressor 1
P16 Over-current of inverter device
P22 Outdoor unit fan motor trouble
P29 Malfunction of compressor 1 start
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, only the outdoor unit which contains the problem
stops but the other outdoor units in the system operate normally.
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, only the outdoor unit which contains the problem
stops but the other outdoor units in the system operate normally.
NOTE:
After automatic backup operation caused by alarm listed in alarm list 1, it will not be canceled automatically
when the repair of the failed outdoor unit is completed.
Automatic backup mode will be canceled only when the power on all outdoor unit is reset.
Therefore, after repair work is completed, be sure to check whether or not automatic backup mode has been
canceled.
Control Functions-Outdoor Unit
Control Functions-Outdoor Unit
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2WAY SYSTEM
2WAY SYSTEM
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