Panasonic U-72MF1U9 Technical Data Manual page 105
3way vrf system
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Also See for U-72MF1U9:
- Service manual (128 pages) ,
- Installation instructions manual (56 pages) ,
- Operating instructions manual (16 pages)
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7. Meaning of Alarm Messages
Alarm messages displayed on system controller
Serial
Error in transmitting serial
communication signal
communication
errors
Mis-setting
Error in receiving serial
communication signal
Activation of
Protective device of sub indoor
unit in group control is activated.
protective
device
NOTE
1.
Alarm messages in << >> do not affect other indoor unit operations.
2.
Alarm messages in < > sometimes affect other indoor unit operations depending on the fault.
Indoor or main outdoor unit is not operating correctly.
Mis-wiring of control wiring between indoor unit, main outdoor unit
and system controller.
Indoor or main outdoor unit is not operating correctly.
Mis-wiring of control wiring between indoor unit, main outdoor unit
and system controller.
CN1 is not connected properly.
When using wireless remote controller or system controller, in
order to check the alarm message in detail, connect wired
remote controller to indoor unit temporarily.
5 - 15
Test Run
C05
C06
P30
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