Troubleshooting Guide

Room AirConditioner VoltageLimits

 

NAME PLATE RATING

 

MINIMUM

 

MAXIMUM

 

208~230±10%

 

 

187V

 

253V

 

115±10%

 

 

104V

 

126V

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

COMPLAINT

CAUSE

 

 

REMEDY

 

 

 

 

 

 

 

 

Fan motor will not run.

No power

 

Check voltage at outlet. Correct if necessary.

 

 

 

 

 

 

 

 

 

Power supply cord

 

Check voltage to rotary switch. If none, check power

 

 

 

 

 

supply cord. Replace cord if circuit is open.

 

 

 

 

 

 

 

 

 

Rotary switch

 

Check switch continuity. Refer to wiring diagram for

 

 

 

 

 

terminal identification. Replace switch if defective.

 

 

 

 

 

 

 

 

Wire disconnected or con-

Connect wire. Refer to wiring diagram for terminal

 

 

nection loose

 

identification. Repair or replace loose terminal.

 

 

 

 

 

 

 

 

 

 

Capacitor (Discharge

 

Test capacitor.

 

 

 

capacitor before testing.)

Replace if not within ±10% of manufacturer's rating.

 

 

 

 

 

Replace if shorted, open, or damaged.

 

 

 

 

 

 

 

 

 

Will not rotate

 

Fan blade hitting shroud or blower wheel hitting

 

 

 

 

 

scroll. Realign assembly.

 

 

 

 

 

 

Units using slinger ring for condenser fan must have

 

 

 

 

 

1/4 to 5/16 inch clearance to the base. If it hits the

 

 

 

 

 

base, shim up the bottom of the fan motor with

 

 

 

 

 

mounting screw(s).

 

 

 

 

 

 

Check fan motor bearings; if motor shaft will not

 

 

 

 

 

rotate, replace the motor.

 

 

 

 

 

 

 

 

 

Fan motor runs

Revolves on overload.

 

Check voltage. If not within limits, call an electrician.

 

intermittently

 

 

 

Test capacitor.

 

 

 

 

 

 

 

 

 

 

 

 

Check bearings. Does the fan blade rotate freely?

 

 

 

 

 

If not, replace fan motor.

 

 

 

 

 

 

Pay attention to any change from high speed to

 

 

 

 

 

low speed. If the speed does not change, replace the

 

 

 

 

 

motor.

 

 

Fan motor noise.

Fan

 

If cracked, out of balance, or partially missing,

 

 

 

 

replace it.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Blower

 

If cracked, out of balance, or partially missing,

 

 

 

 

 

replace it.

 

 

 

 

 

 

 

 

 

 

 

Loose clamper

 

Tighten it.

 

 

 

 

 

 

 

 

 

 

Worn bearings

 

If knocking sounds continue when running or loose,

 

 

 

 

 

replace the motor. If the motor hums or noise

 

 

 

 

 

appears to be internal while running, replace motor.

 

 

 

 

 

 

 

 

 

Compressor will not run,

Voltage

 

Check voltage.

 

 

but fan motor runs.

 

 

 

If not within limits, call an electrician.

 

 

 

 

 

 

 

 

 

Wiring

 

Check the wire connections, if loose, repair or

 

 

 

 

 

replace the terminal. If wires are off, refer to wiring

 

 

 

 

 

diagram for identification, and replace. Check wire

 

 

 

 

 

locations. If not per wiring diagram, correct.

 

 

 

 

 

 

 

 

 

Rotary

 

Check for continuity, refer to the wiring diagram for

 

 

 

 

 

terminal identification. Replace the switch if circuit is

 

 

 

 

 

open.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Service Manual 26

Page 24 Page 26
Page 25
Image 25
Heat Controller REG-183A, REG-243A service manual Room Air Conditioner Voltage Limits, Complaint Cause Remedy
Page 24 Page 26

REG-183A, REG-243A specifications

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