Mitsubishi SRK90CL-BN, Technical Manual

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'12 • SRK-T-122
Indoor unit display panel
TIMER
6 times
flash
ON
ON
ON
RUN
light
Keeps
flashing
Keeps
flashing
Keeps
flashing
(5) Self-diagnosis table
When a heat exchanger sensor 1 wire disconnection is detected while
operation is stopped. (If a temperature of –28ºC or lower is detected for
15 seconds, it is judged that the wire is disconnected.)
(Not displayed during operation.)
When a room temperature sensor wire disconnection is detected while
operation is stopped. (If a temperature of –45ºC or lower is detected for
15 seconds, it is judged that the wire is disconnected.)
(Not displayed during operation.)
• Broken heat exchanger sensor
1 wire, poor connector
connection
• Indoor PCB is faulty
• Broken room temperature
sensor wire, poor connector
connection
• Indoor PCB is faulty
Heat exchanger
sensor 1 error
Room
temperature
sensor error
When conditions for turning the indoor unit’s fan motor on exist during air
conditioner operation, an indoor unit fan motor speed of 300 rpm
• Defective fan motor, poor
connector connection
Indoor fan
motor error
–55ºC or lower is detected for 5 seconds continuously 3 times within
40 minutes after initial detection of this anomalous temperature.
Or –55ºC or higher is detected for within 20 seconds after power ON.
(The compressor is stopped.)
–25ºC or lower is detected for 5 seconds continuously 3 times within
40 minutes after initial detection of this anomalous temperature.
(The compressor is stopped.)
• Broken heat exchanger sensor
wire, poor connector
connection
• Outdoor main PCB is faulty
Outdoor heat
exchanger
sensor error
–25ºC or lower is detected for 5 seconds continuously 3 times within 40
minutes after initial detection of this anomalous temperature.
(The compressor is stopped.)
• Broken discharge pipe sensor
wire, poor connector
connection
• Outdoor main PCB is faulty
Discharge pipe
sensor error
gency stop caused by trouble in the outdoor unit, When there is an emer
or the input current value is found to be lower than the set value.
(The air conditioner stops.)
• Broken compressor wire
• Compressor blockage
Trouble of
outdoor unit
When the value of the discharge pipe sensor exceeds the set value.
(The air conditioner stops.)
• Gas shortage, defective
discharge pipe sensor, service
valve is closed
Over heat of
compressor
When there is no signal between the indoor PCB and outdoor PCB for
10 seconds or longer (when the power is turned on), or when there is no
signal for 7 minute 35 seconds or longer (during operation)(the
compressor is stopped).
• Defective power supply,
Broken signal wire, defective
indoor/outdoor sub PCB
Error of signal
transmission
Description
of trouble
Cause Display (flashing) condition
• Broken outdoor air temp.
sensor wire, poor connector
connection
• Outdoor main PCB is faulty
Outdoor air
temperature
Wired
sensor error
measured for 30 seconds or longer. (The air conditioner stops.)
1 time
flash
2 times
flash
ON
ON
ON
5 times
flash
6 times
flash
The wired remote controller wire Y is open. The wired remote
controller wires X and Y are reversely connected. Noise is penetrating
the wired remote controller lines. The wired remote controller or indoor
PCB is faulty. (The communications circuit is faulty.)
• Broken wired remotc controller
wire, defective indoor PCB
Error of wired
remote controller
wiring
light
2 times
flash
4 times
flash
2 times
flash
1 time
flash
remote
controller
display
— — E1
E5
E36
E59
E39
E37
E38
E16
E7
E6
or lower is