Panasonic R410A service manual Service procedures, Remarks

								4. Service procedures
(2) LED Indicator Messages on Outdoor Control PCB
			LED 1		LED 2			Remarks
Power ON sequence
1. No communication from indoor units in system							If it is not possible to
2. Communication received from 1 or more indoor units in system							advance to 3, repeats 1 → 2.
							At 3, changes to normal
3. Regular communication OK (Capacity and unit quantity match)							control.
Normal operation							Displayed during automatic
EEPROM error (F31)							address setting 1 and initial
							communication. After these are
							completed, alarm F31 is displayed.
Pre-trip (insufficient gas)							P03
				(0.25/0.75)
Pre-trip (P20)
				(0.75/0.25)
Pre-trip (other)
Alarm	Alternate blinking during alarms
	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.
		* Refer to “1. Examples of alarm display” below.
Insufficient gas indicator
Refrigerant recovery mode
Automatic address setting
Automatic address setting in progress							Blinking alternately
Automatic address setting alarm (E15)						(0.25/0.75)	Blinking simultaneously
				(0.25/0.75)
Automatic address setting alarm (E20)				(0.75/0.25)		(0.75/0.25)	Blinking simultaneously
Automatic address setting alarm (Other than E15 and E20)							Blinking simultaneously

: ON

: Blinking (0.25/0.75) indicates that the lamp illuminates for 0.25 seconds, and then is OFF for 0.75 seconds. Unless otherwise indicated, the blinking is (0.5/0.5).

: OFF

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(3) Examples of alarm display (other than E15, E16, and E20)

Alarm / Display	LED 1	→	Alternately	→ LED 2
P03	( Blinks		2 times )	(Blinks 3 times)
P04		( " )		(Blinks 4 times)
P05		( " )		(Blinks 5 times)
P31		( " )		(Blinks 31 times)
H01	(Blinks		3 times)	(Blinks 1 times)
•			•
E04	(Blinks		4 times)	(Blinks 4 times)
•			•
F07	(Blinks		5 times)	(Blinks 7 times)
•			•
L13	(Blinks		6 times)	(Blinks 13 times)
•			•

Note:

This table shows example alarms. Other alarms may also be displayed.

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