Power Led Error Code Definition And The Failure-Causing-Boards - Panasonic G20 Series Troubleshooting Handbook

Power LED Error Code Definition and the Failure-Causing-
POWER LED
ERROR CIRCUIT MONITORED
CODE
Panel Information SOS
1 BLINLK
Panel Alarm SOS
2 BLINKS P15V form the P board
3 BLINKS P3.3V from the A board
Power Supply output
4 BLINKS
voltages
5 BLINKS P5V from the A board
6 BLINKS SC Energy Recovery Circuit
Boards
CONDITIONS TRIGGERING
THE SHUTDOWN
Communication problem between CPUs on A board.
Missing P15V
•
P15V is not been generated by the P board.
•
P15V is been affected by one of the boards it is
connected to (A short circuit of the P15V).
Wrong diagnostic by the A board
Missing P3.3V
Reasons:
•
The A board is not generating the 3.3V
•
The 3.3V is been affected by one of the C boards
or the Panel (A short circuit of the P3.3V).
Wrong diagnostic by the A board
Regulation issues with any of the voltages output from the
power supply.
Wrong diagnostic by the A board
Missing P5V
Reasons:
•
The A board is not generating the 5V
• The 5V is been affected by the SC, SS, A, or C2
board (A short circuit of the P5V).
Wrong diagnostic by the A board
An increase or reduction of the Energy Recovery Circuit
output (MID).
Open connection between connector A33 on the A board
and SC20 on the SC board.
Open connection between any of the ribbon cables on the
C boards and the A board.
Open connection between the ribbon cable/cables
interconnecting the C boards.
Wrong diagnostic by the A board.
LIST OF BOARDS POSSIBLY CASUSING THE FAILURE
MOST
2 OCCASIONALLY
ND
COMMON
¤ ¤
A
SC P SS
C1 or C2 A Panel
¤
P A
SC,SS C2 A
¤
SC A
RARELY
¤
A
¤
¤
¤
C
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