Mitsubishi SCM40ZS-S, Техническое руководство

Страница: 214 / 335

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213
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'16 • SCM-T-199
Rotor lock
(8) Phenomenon observed after shortcircuit, wire breakage on sensor
(a) Indoor unit
Defective compressor, defective
outdoor PCB
Sensor
Operation
mode
Phenomenon
Shortcircuit Disconnected wire
Room temperature
sensor
Cooling
Heating
Heat exchanger
sensor
Cooling
Heating
Humidity sensor
(1)
Cooling
Heating
■
Humidity sensor operation
Failure mode Control input circuit resding Air conditioning system operation
①
②
①②
①
②
See page 210.
Note (1) SRK35, 50ZJ, 50, 60ZJX, 71ZK-S,SRF25, 35, 50 only
main
Has an overflow developed?
YES YES
NO NO
NO
NO
YES
YES
Is the float switch operating?
Indoor PCB is
defective.
Inspect float switch.
Repair and clean.
Indoor PCB is defective.
Is there output for drain motor driver?
Is the drain piping clogged or at
the wrong gradient?
Drain motor is defective.
Inspect wiring.
Drain abnormality (SRR only) [Drain piping defective,pump defect,
float switch, indoor PCB]
Service valve (gas side) closed operation
Service valve (gas side) closed,
Defective outdoor PCB
Are the service valve (gas side)
opened ?
Open the valve.
NO
YES
NO
YES
Is the checked result of power
transistor module OK ?
Defective outdoor PCB Replace.
Defective outdoor PCB Replace.
NO
YES
Is the space for installation of indoor and/or
outdoor unit enough ?
Is there any short circuit of air on indoor
and/or outdoor unit ?
At heating, does the indoor fan motor run ?
Is the filter clogged ?
Is there any liquid flooding ?
Is there any anomalous sound on the
compressor?
After resetting power for several
times does it become normal ?
Temporary noise may cause of anomaly.
If noise source can be found, take
countermeasure.