Mitsubishi Heavy Industries SRK20ZJ-S Technical Manual

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193
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'10 • SR-T-091
'09•SRK-DB-087D
Trouble of outdoor unit
Insufficient refregerant amount, Faulty power transistor, Broken compressor wire
Service valve close, Defective EEV, Defective outdoor PCB
．
◆
(1)
(1)
(2)
(3)
Notes (1)
(2)
(3)
198
195
Check coil resistance, see page 190.
Outdoor fan motor error
Defective fan motor, connector poor
connection, defective outdoor PCB
See pages 198 for the fan motor and outdoor PCB check pro-
After making sure the fan motor and outdoor PCB are nor-
Power supply reset
Is it normalized?
Malfunction by temporary noise
Replace fan motor. (If the
error persists after replacing
the fan motor, replace the
outdoor PCB.)
the fan motor and outdoor
ourdoor PCB
outdoor
Replace outdoor fan motor
'09•SRK-DB-087D
Outdoor fan motor error
Rotor lock
(8) Phenomenon observed after shortcircuit, wire breakage on sensor
(a) Indoor unit
Defective fan motor, connector poor
connection, defective outdoor PCB
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 190.
Note (1) SRK35, 50ZJ-S, 50, 60ZJX-S, SRF25, 35, 50ZJX-S only
'09•SRK-DB-087D
Outdoor fan motor error
Rotor lock
(8) Phenomenon observed after shortcircuit, wire breakage on sensor
(a) Indoor unit
Defective fan motor, connector poor
connection, defective outdoor PCB
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 190.
Note (1) SRK35, 50ZJ-S, 50, 60ZJX-S, SRF25, 35, 50ZJX-S only
Has an overflow developed?
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]

Mitsubishi Heavy Industries SRK20ZJ-S Specifications

General

Brand	Mitsubishi Heavy Industries
Model	SRK20ZJ-S
Category	Air Conditioner
Language	English