SiUS12-928_A
Troubleshooting
Service Diagnosis
106
5.5
Fan Motor or Related Abnormality
5.5.1 AC Motor (Slim Duct Built-in System)
Remote
Controller
Display
A6
Method of
Malfunction
Detection
The rotation speed detected by the Hall IC during fan motor operation is used to determine
abnormal fan motor operation.
Malfunction
Decision
Conditions
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.
Supposed
Causes
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
Troubleshooting
Check No.16
Refer to P.158
NO
NO
NO
Check No. 16
Check Hall IC
NO
NO
NO
YES
YES
YES
YES
YES
YES
(R11411)
Caution
Replace the fan motor or 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.
Replace the fan motor.
Replace the indoor unit PCB.
Does the fan rotate?
Is there an output?
Is it the rated voltage?
∗
Does the fan rotate
smoothly?
Is it the rated voltage?
∗
Is there continuity?
Start operation.
Turn off the power supply and
rotate the fan by hand.
Check the fan motor voltage.
Turn the power on and check the
fan motor voltage. (immediately
after restart)
Check the capacitor's continuity.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
∗
Measure the voltage between
the red and black lead wires of
the fan motor, and check if the
maximum voltage reaches the
rated voltage.
Summary of Contents for SUPER MULTI NX G Series
Page 1: ...SiUS12 928_A Applied Models Inverter Multi Heat Pump G Series J Series...
Page 7: ...SiUS12 928_A Table of Contents vi...
Page 10: ...SiUS12 928_A 1 List of Functions Part 1 List of Functions 1 Functions 3...
Page 11: ...SiUS12 928_A List of Functions 2...
Page 17: ...SiUS12 928_A Specifications 8...
Page 23: ...SiUS12 928_A Specifications Specifications 14...
Page 25: ...SiUS12 928_A Printed Circuit Board Connector Wiring Diagram 16...
Page 37: ...SiUS12 928_A Function and Control 28...
Page 69: ...SiUS12 928_A Control Specification Function and Control 60...
Page 71: ...SiUS12 928_A Operation Manual 62...
Page 73: ...SiUS12 928_A Duct Free System Operation Manual 64 2 Duct Free System 2 1 Remote Controller...
Page 84: ...Duct Free System SiUS12 928_A 75 Operation Manual...
Page 85: ...SiUS12 928_A Duct Free System Operation Manual 76 2 8 TIMER Operation...
Page 86: ...Duct Free System SiUS12 928_A 77 Operation Manual...
Page 87: ...SiUS12 928_A Duct Free System Operation Manual 78 2 9 Note for Multi System...
Page 88: ...Duct Free System SiUS12 928_A 79 Operation Manual...
Page 97: ...SiUS12 928_A Slim Duct Built In System Operation Manual 88...
Page 99: ...SiUS12 928_A Service Diagnosis 90...
Page 169: ...SiUS12 928_A Removal Procedure 160...
Page 225: ...SiUS12 928_A Trial Operation and Field Settings 216...
Page 235: ...SiUS12 928_A Appendix 226...