Panasonic U-72MF1U9, Service Manual

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3 - 4
Trouble Diagnosis
2. Outdoor Unit Control PCB LED Display
1
2
3
4
5
6
7
8
( : ON : Blinking : OFF)
LED (RED)
Display meaning
1 2
After the power is turned ON (and automatic address setting is not in progress), no
communication with the indoor units in that system is possible.
(Both OFF)
After power is turned ON (and automatic address setting is not in progress), 1 or more indoor
units are confirmed in that system; however, the number of indoor units does not match the
number that was set.
(OFF) (ON)
Automatic address setting was completed successfully. (After the power is turned ON,
and automatic address setting is not in progress, the number of detected indoor units
connected to that system matches the number that was set, and regular communications
are occurring.)
(Both OFF)
Automatic address setting is in progress.
(Blinking alternately)
At time of automatic address setting, the number of indoor units did not match the
number that was set.
(Both blinking)
Alarm display
LED 1 blinks M times, then LED 2 blinks N times. The cycle then repeats.
M = 2: P alarm 3: H alarm 4: E alarm 5: F alarm 6: L alarm
N = Alarm No.
Example: LED 1 blinks 2 times, then LED 2 blinks 17 times. The cycle then repeats.
Alarm is “P17.”
(Blinking alternately)
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