E5-00" - Compressor Motor Lock Or Overheated; E6-00" - Compressor Motor Lock - Daikin 2MXM50M Service Manual

ESIE16-02B | Part 2. Troubleshooting
2.2.2.3. "E5-00" – Compressor motor lock or overheated
Trigger
Compressor overload is detected.
Possible cause
Faulty discharge pipe thermistor.
Faulty outdoor fan motor.
Faulty overload protection.
Faulty expansion valve.
Faulty 4-way valve.
Faulty outdoor unit main PCB.
Faulty power module = faulty outdoor
inverter PCB.
Refrigerant shortage.
Humidity in refrigerant (ice formation in
expansion valve).
Non condensables in refrigerant.
Stop valve is closed.
2.2.2.4. "E6-00" – Compressor motor lock
Trigger
The motor rotor does not rotate when the
compressor is energized.
Possible cause
Faulty discharge thermistor.
Refrigerant shortage.
Humidity in refrigerant (ice formation in
expansion valve).
Page 26
RA R32 Split & multi split M-Series
Effect
Unit will stop operating.
Check
Check discharge pipe thermistor.
Check the fan motor.
Check fan motor connections and wiring.
Check the overload protection.
Check the overload protection connec-
tions and wiring.
Check the expansion valve.
Check the 4-way valve.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
Check outdoor inverter PCB.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check for refrigerant shortage. Refer to
the nameplate for the correct charge.
Check for humidity in the refrigerant.
Check for non condensables in refriger-
ant.
Check stop valve.
Effect
Unit will not stop operating.
Unit will stop operating.
Check
Check the discharge thermistor.
Check for refrigerant shortage. Refer to
the nameplate for the correct charge.
Check for humidity in the refrigerant.
2.2. Error based troubleshooting
Reset
Automatic reset if the unit runs for 60 sec-
onds without error.
Corrective action
Replace discharge pipe thermistor when
required.
Replace fan motor when required.
Adjust wiring when required.
Replace the overload protection when
required.
Adjust wiring when required.
Replace the expansion valve body or
motor when required.
Replace the 4-way valve coil or body
when required.
Restore the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
Restore the power to the outdoor inverter
PCB.
Replace the outdoor inverter PCB when
required.
Charge the correct refrigerant amount
when required.
In case of suspicion of humidity, recover,
vacuum and recharge with virgin refriger-
ant.
In case of suspicion of non condensables,
recover, vacuum and recharge with virgin
refrigerant.
Open stop valve when required.
Reset
Automatic reset after a continuous run for
about 10 min.
Manual reset via user interface.
Corrective action
Replace discharge thermistor when
required.
Charge the correct refrigerant amount
when required.
In case of suspicion of humidity, recover,
vacuum and recharge with virgin refriger-
ant.
4/04/17 | Version 1.1