Mitsubishi Electric PUHY-M200YNW-A1 Service Handbook page 286

[8-8 Troubleshooting LEV, FCV Problems ]
3) FCV operation
(f)
(c)
(2) Judgment methods and possible failure mode
Malfunction mode
(1) Loose connector
(2) Wiring fault, flow
control valve fault
(3) Control board fault
BS_08_E
(a)
(b)
(d)
(e)
Judgment method
Check for connector connection failure.
Check for a broken wiring, and check the resistance of
the flow control valve.
If no problems are found with the above items, replace
the control board.
(a) Close
(b) Open
(c) Fully open valve (85 pulses)
(d) Fully close valve (770 pulses)
(e) No. of pulses
(f) Valve opening degree
Remedy
Reinsert the connector, restart
the operation, and check for
proper operation.
Replace the flow control valve.
Replace the control board.
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