Discharge Pipe Temperature Error - Mitsubishi Heavy Industries FDT Series Technical Manual

Error code
Indoor control PCB
E36
Remote controller:
Outdoor control PCB
Outdoor inverter
Note (1) Value in is for the models SRC40-60.
1. Applicable model
All models
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 discharge pipe
temperature anomaly is detected
2 times within 60 minutes or
this anomalous state is detected
60 minutes continuously
including compressor stop.
4. Presumable cause
• Defective outdoor control
PCB
• Defective discharge pipe
temperature thermistor
• Clogged filter
• Indoor, outdoor unit
installation spaces
• Short-circuit of air on indoor,
outdoor units
• Fouling, clogging of heat
exchanger
Note:
LED Green
Keeps flashing
Keeps flashing
Yellow
PCB
Keeps flashing
5. Troubleshooting
discharge pipe temperature
temperature error persisted
discharge pipe temperature
temperature (measured
actually) at detection of
* 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.
Red
Content
Stays OFF
1 5 time flash
Diagnosis
* For the characteristics of discharge
Are the
pipe temperature, refer to E39.
characteristics of
thermistor
normal?
YES
Is the
discharge pipe
during cooling
operation?
NO
Is the
control normal?
YES
Is the
error correct?
- 399 -
'12 • PAC-T-173
Discharge pipe
temperature error
Countermeasure
Replace discharge pipe
NO
temperature thermistor.
YES
amount : Recharge
refrigerant by weighing
proper amount on a scale.
Control operation check *
NO
Defective outdoor control
NO
PCB Replace.
Check unit side:
YES
• Isn't filter clogged?
• Are adequate indoor,
outdoor unit installation
spaces?
• Isn't there any short-
circuit of air?
• Isn't there any fouling,
clogging on indoor heat
exchanger?