Mitsubishi Heavy Industries HMS140VA1 User Manual

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176
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Service
'13 • HM-T-193
Troubleshooting guide
E45 - Inverter communication error
Correct the connection
Set JSW10, 11 correctly
NO
YES
NO
YES
Is the voltage 15VDC detected
between 㽳 and 㽴 of CNI3 on
the control PCB side?
Replace the outdoor
fan motor
Note (3): Under anomalous conditions,
the voltage becomes less than 14VDC.
(2) (3)
Is the voltage 15VDC detected
after disconnecting the
connector of outdoor fan motor?
(1)
Replace the ourdoor control PCB
Has the fault been corrected?
Replace the control PCB
If not solved yet, replace
the inverter PCB as well.
OK
YES
Note (2): How to check voltage at
CN13 㹢See E51.
NO
YES
YES
NO
Connect the signal wire
securely
YES
Is the connection of signal wire
between inverter PCB and
outdoor control PCB OK?
Note (1): See page 180 & 181
of manual '10-HM-T149
(3)
NO
YES
Replace the inverter PCB
NO
NO
Is the communication between
the control PCB and the inverter
PCB OK?
Are JSW10, 11 on the inverter
PCB all set correctly ?
Does the LED on the inverter
PCB flash?

Mitsubishi Heavy Industries HMS140VA1 Specifications

General

Brand	Mitsubishi Heavy Industries
Model	HMS140VA1
Category	Heat Pump
Language	English