Outdoor Unit Control Pcb Led Display - Panasonic U-72MF1U9 Service Manual

2. Outdoor Unit Control PCB LED Display

LED (RED)
1
(Both OFF)
(OFF)
(Both OFF)
(Blinking alternately)
1
(Both blinking)
2
(Blinking alternately)
3
4
5
6
7
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.
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
(ON)
number that was set.
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.)
Automatic address setting is in progress.
At time of automatic address setting, the number of indoor units did not match the
number that was set.
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."
(
Display meaning
3 - 4
Trouble Diagnosis
: ON : Blinking : OFF)