Mitsubishi Electric CITY MULTI PUHY-P200YEM-A Service Handbook page 129

Checking code Meaning, detecting method
4116 Fan speed (Detects only for PKFY-VAM)
abnormality 1. Detecting fan speed below
(motor 180rpm or over 2000rpm dur-
abnoramlity) ing fan operation at indoor unit
(first detection) enters into the
3-minute restart prevention
mode to stop fan for 30 sec-
onds.
2. When detecting fan speed be-
low 180rpm or over 2000rpm
again at fan returning after 30
seconsd from fan stopping, er-
ror stop (fan also stops) will be
commenced displaying 4116.
Cause
1) Disconnection of fan speed detect-
ing connector (CN33) of indoor
controller board.
2) Disconnection of fan output connec-
tor (FAN1) of indoor power board.
3) Disconnection of fan speed
detecting connector (CN33) of
indoor controller board, or that of
fan output connector (FAN1) of
indoor power board.
4) Filter cologging.
5) Trouble of indoor fan motor.
6) Faulty fan speed detecting circuit
of indoor controller board, or
faulty fan output circuit of indoor
power board.
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Checking method & Countermeasure
• Confirm disconnection of connector
(CN33) on indoor controller
board.
• Confirm disconnection of connector
(FAN1) on indoor power board.
• Check wiring for disconnection.
• Check filter.
• Check indoor fan motor.
• When aboves have no trouble.
1) For trouble after operating fan.
Replace indoor controller board. If
not remedied, replace indoor
power board.
2) For trouble without operating fan.
Replace indoor power board.