L1-00" - Outdoor Main Pcb Abnormality; L3-00" - Switch Box Temperature Abnormality - Daikin 2MXM50M Service Manual

ESIE16-02B | Part 2. Troubleshooting
2.2.2.19. "L1-00" – Outdoor main PCB abnormality
Trigger
Outdoor main PCB detects current/volt-
age errors.
Possible cause
Blown fuse.
Faulty outdoor unit main PCB.
Faulty outdoor inverter PCB.
Faulty compressor.
Faulty or disturbance of the power supply
(imbalance > 10%). Power drop. Short cir-
cuit.
Faulty outdoor fan motor.
Faulty capacity adapter on outdoor PCB.
External factory (e.g. electrical noise).
(cause when error is reset after power
reset, and error happens again after a
while).
More info:
Check procedures
"Main PCB" on page 53
"Compressor" on page 47
"Electronic expansion valve" on page 49
"Fan motor" on page 51
2.2.2.20. "L3-00" – Switch box temperature abnormality
Trigger
Switch box temperature is too high when
the compressor is off.
Page 34
RA R32 Split & multi split M-Series
Effect
Unit will stop operating.
Check
Check fuse on outdoor main PCB.
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 alive led is blinking in regular
intervals.
Check if the correct spare part is installed.
Check compressor.
Check connections and wiring of the com-
pressor.
Check expansion valve (liquid back
issue).
Check the refrigerant charge. Refer to the
nameplate for correct charge.
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Check the fan motor.
Check fan motor connections and wiring.
Check if the correct adapter is installed.
Check if the correct spare part is installed.
Check for source which could cause elec-
trical interference.
Replacing procedures
"Replacing main PCB" on page 84
"Replacing compressor" on page 76
"Replacing expansion valve body" on page 81
"Replacing DC fan motor assembly" on page 79
Effect
Unit will not stop operating.
Unit will stop operating.
2.2. Error based troubleshooting
Reset
Manual reset via user interface.
Power reset via outdoor unit.
Corrective action
Replace fuse if blown.
Adjust the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
Adjust the power to the outdoor inverter
PCB.
Replace outdoor inverter PCB.
Replace compressor when required.
Investigate reason of breakdown.
Replace expansion valve when required.
Fix possible leak.
Adjust power supply when required.
Power reset via outdoor unit.
Replace fan motor when required.
Adjust wiring when required.
Adjust capacity adapter when required.
Avoid electrical interference.
Reset
Automatic reset when temperature drops.
Manual reset via remote controller.
4/04/17 | Version 1.1