Mitsubishi Heavy Industries SRK100VNXWZRF Service Manual page 64

Model FDC100VNP-W
(c) Models FDC71, 90VNP ● Checking method
(i) Setup procedure of checker.
1) Power OFF (Turn off the breaker).
2) Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor.
3) Connect the wires U (Red) , V (White) and W (Black) of checker to the terminal of disconnected wires (U, V, W)
from compressor respectively.
4) Connect the short connector to CNROM on the main PCB.
(ii) Operation for judgment.
1) Power ON.
2) After 15 seconds since power has turned ON. LED start ON/OFF for 5 seconds cyclically and it repeats 10 times.
3) Check ON/OFF status of 6 LED's on the checker.
4) Judge the PCB by ON/OFF status of 6 LED's on the checker.
ON/OFF
status of LED according to following pattern
Control PCB
Power ON or start check operation
15 sec.
5) Be sure to disconnect the connector from CNROM, after finishing the check operation.
〈Inverter Checker〉
Faston terminal
Connect to the terminal of the wires which are disconnected from compressor.
If all of LED are ON/OFF
Normal
During this period, ON/OFF status of LED is
repeated cyclically according to following pattern
1 2 3
5sec. 5sec.
5sec.
LED
Red
White
U
Black
V
W
MAIN PCB
CPU
32
31
-
If all of LED stay OFF or
some of LED are ON/OFF
Anomalous
10
LED ON/OFF pattern
LED1 LED1 LED1
LED2 LED2
LED3 LED3 LED3
LED4 LED4
LED5 LED5 LED5
LED6 LED6
5V Short connector
CNROM
8
LED0
5V 5V
1
63
-
'22 • PAC-SM-422
LED1 LED1 LED1
LED2 LED2 LED2
LED3 LED3 LED3
LED4 LED4 LED4
LED5
LED5 LED5
LED6 LED6 LED6
Cyclically
● ON
○ OFF
LED2
LED4
LED6