Mitsubishi Electric SRK100VNPZJX, Technical Manual

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388
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'12 • PAC-T-174
E35
1. Applicable model
5. Troubleshooting
All models Diagnosis Countermeasure
Are the
characteristics of
outdoor heat exchanger
temperature thermistor
normal?
Is
the temperature
(measured actually) at
detection of error
correct?
NO
YES
YES
* For the contents of control, refer to the protective control by controlling
compressor rotation speed and cooling high pressure protective control of
micro computer control function for corresponding models.
Is the
unit operating in the
state of cooling
overload?
Is the high
pressure control
normal?
YES
NO
* For the characteristics of outdoor
heat exchanger temperature
thermistor, refer to E37.
YES
NO
NO
Replace outdoor heat
exchanger temperature
thermistor.
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 heat
exchanger?
Control operation check *
Defective outdoor control
PCB
➞
Replace.
Excessive refrigerant
amount : Recharge
refrigerant by weighing
proper amount on a scale.
2. Error detection method
For the error detection method,
refer to the protective control by
controlling compressor rotation
speed and cooling high pressure
protective control of micro
computer control function for
corresponding models.
3. Condition of Error displayed
When outdoor heat exchanger
temperature anomaly is detected
5 times within 60 minutes or
this anomalous state is detected
60 minutes continuously
including compressor stop.
4. Presumable cause
• Defective outdoor heat
exchanger temperature
thermistor
• Defective outdoor control
PCB
• Indoor, outdoor unit
installation spaces
• Short-circuit of air on indoor,
outdoor units
• Fouling, clogging of heat
exchanger
• Excessive refrigerant amount
Note:
Error code
Remote controller:
LED Green Red
Outdoor control PCB
Outdoor inverter
PCB
1 time flash Keeps flashing
Yellow LED or Red LED Green LED
Indoor control PCB Stays OFF Keeps flashing
Keeps flashing
Content
Keeps flashing
Cooling overload operation