Inverter Checker For Diagnosis Of Inverter Output; Outdoor Unit Inspection Points - Mitsubishi Heavy Industries SCM50ZS-S1 Technical Manual

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Inverter checker for diagnosis of inverter output

●Checking method
(a) Setup procedure of checker.
(i) Power OFF (Turn off the breaker).
(ii) Remove the terminal cover of compressor and disconnect the wires (U, V, W) from compressor.
(iii) Connect the wires U (Red) , V (White) and W (Black) of the checker to the terminal of disconnected wires (U, V, W)
from compressor respectively.
(b) Operation for judgment.
(i) Power ON and start check operation on cooling or heating mode.
(ii) Check ON/OFF status of 6 LED's on the checker.
(iii) Judge the PCB by ON/OFF status of 6 LED's on the checker.
ON/OFF
status of LED according to following pattern
Outdoor main
PCB
Power ON
3 min.
Start check operation
(iv) Stop check operation within about 2minutes after starting check operation.
〈Inverter Checker〉
Faston terminal
Connect to the terminal of the wires which are disconnected from compressor.
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Outdoor unit inspection points

●See page 213 to 216.
If all of LED are ON/OFF
Normal
Stop check operation
LED
Red
White
U
Black
V
W
225
-
If all of LED stay OFF or
some of LED are ON/OFF
Anomalous
During this period, ON/OFF status of LED is
repeated cyclically according to following pattern
LED ON/OFF pattern
LED1 LED1 LED1
LED2 LED2
LED3 LED3 LED3
LED4 LED4
LED5 LED5 LED5
LED6 LED6
-
'18 • SCM-T-251
LED1 LED1
LED2 LED2 LED2
LED3 LED3
LED4 LED4 LED4
LED5 LED5
LED6 LED6 LED6
Cyclically
LED1
LED2
LED3
LED4
LED5
LED6
● ON
○ OFF