Heat Controller BHD-651-D, BHD-301-D, BHD-501-D service manual Condition, Cause, Remedy

Models: BHD-501-D BHD-301-D BHD-651-D

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CONDITION

CONDITION

CAUSE

REMEDY

5. Noisy operating

Fan

If cracked, out of balance, or partially

 

 

missing, replace it

Loose foreign material inside the housing. Tube hits frame.

Fan blade hits frame Internal compressor noise. Loose set screws

Worn bearings of Motor Assembly

Remove it.

Adjust tubing routine carefully.

Check Motor Mount. If loose, tighten it. Replace compressor.

Tighten them.

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 assembly.

6. Water drips

The bucket is not installed properly.

The bucket should be properly positioned on the hangers of the drain pan.

 

Connection may be loose.

Check connection and repair.

 

Leak in bucket

Replace bucket.

 

Water drips when bucket removed for

Before removing bucket, the unit should

 

emptying.

be turned off.

 

Bucket overflows.

Check micro switch and float.

7. Compressor cycles on overload

High or low line voltage. (115V ± 10%)

Check line voltage. It must be between

protector. (OLP)

 

103.5V and 126.5V volts.

 

 

If intermittent, provide new supply.

 

Poor air circulation.

Move dehumidifier for free and

 

 

unobstructed air flow.

Heat Exchange clogged with dust or dirt. Motor

Short circuit or ground in electrical circuit Unit pressures not equalized

Capacitor

Wiring

Refrigeration system

Stuck compressor

Overload protector (OLP)

Clean dust or dirt on the Heat Exchange.

If not running, determine the cause. Replace if required.

Check electrical circuit. Repair.

Allow 2 or 3 minutes for pressure to equalize before starting compressor.

Test the capacitor.

Check the terminals. If loose, repair or replace.

Check the system for a restriction. Check compressor, replace compressor

Check OLP, if externally mounted. Replace if open. (If the compressor temperature is high, remove the OLP, cool, and retest.)

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Heat Controller BHD-651-D, BHD-301-D, BHD-501-D service manual Condition, Cause, Remedy