Mitsubishi Heavy Industries SRK60ZJX-S, Technical Manual

Page: 235 / 272

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234
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'10 • SR-T-091
E35
Cooling overload operation
1. Applicable model
5. Troubleshooting
All models
Diagnosis Countermeasure
Are normal
the characteristics of
outdoor heat exchanger
temperature sensor
normal?
Is
the temperature
(measured actually) at
direction of error
correct?
NO
YES
YES
Is the
unit operating in
the state of cooling
overload?
Is the high
pressure control
normal
YES
YES
* For the characteristics of outdoor
heat exchanger temperature
sensor, refer to E37.
NO
NO
NO
Replace outdoor heat
exchanger temperature
sensor.
Check unit side.
• Isn’t the air circulation
of outdoor unit short-
circuited?
• Are installation spaces
adequate?
• Isn’t there any fouling
or clogging on heater
exchanger?
Control operation check*
Defective outdoor
PCB
➞
Replace.
Excessive refrigerant
amount: Recharge
refrigerant by weighing
proper amount on a scale.
2. Error detection method
Anomalous stop
Reset
53 63
Outdoor heat exchanger temperature (°C)
3. Condition of Error displayed
When anomalous outdoor heat
exchanger temperature occurs
5 times within 60 minutes
or 63°C or higher continues
for 10 minutes, including the
compressor stop.
4. Presumable cause
• Defective outdoor heat
exchanger temperature sensor
• Defective outdoor PCB
• Indoor, outdoor unit
installation spaces
• Short-circuit of air on indoor,
outdoor units
• Fouling, clogging of heat
exchanger
• Excessive refrigerant quantity
Note:
Error code
Remote controller:
LED Green Red
Content
Indoor Stays OFF Keeps flashing