Daikin 2MXS40H2V1B Service Manual page 175

SiBE121123_A
5.3.2 AC Motor (Floor / Ceiling Suspended Dual Type, Duct Connected Type)
A6
Error Code
Method of Error The rotation speed detected by the Hall IC during fan motor operation is used to determine
Detection abnormal fan motor operation.
Error Decision The detected rotation speed does not reach the demanded rotation speed of the target tap, and
is less than 50% of the maximum fan motor rotation speed.
Conditions
Supposed
Causes
Troubleshooting
Check No.04
Refer to P.208
Service Diagnosis
Layer short inside the fan motor winding
Breaking of wire inside the fan motor
Breaking of the fan motor lead wires
Defective capacitor of the fan motor
Defective indoor unit PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Start operation.
Does the fan rotate?
NO
Turn off the power supply and
rotate the fan by hand.
Does the fan rotate
smoothly?
YES
Turn the power on and check the
fan motor voltage. (immediately
after restart)
Voltage as rated?
YES
Check the capacitor's continuity.
Is there continuity?
NO
YES
Check No. 04
Check Hall IC
Is there an output?
NO
YES
Check the fan motor voltage.
Voltage as rated?
YES
NO
YES
Troubleshooting for RA Indoor Unit
NO
Replace the fan motor or the
indoor unit PCB.
Replace the fan motor.
NO
Replace the indoor unit PCB.
Replace the fan motor.
Replace the indoor unit PCB.
Replace the capacitor.
(Replace the indoor unit PCB.)
Replace the fan motor.
(R18358)
164