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Service Manual
CHF-25
CHF-25 Non-Heated Unit
Service Manual
Contents
Operation and Maintenance Procedures 2
Trouble Shooting 3
Parts Description 4
Wiring Diagram 5
Technical Information 6
Warranty Service Policy 7
Quikserv Corp. quikserv.com
• 1-800-388-8307 • Fax (713) 849-5708
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Service Manual
CHF-25
CHF-25
Operaon and Maintenance Procedures
Pre-Operation Procedures:
Ensure that the power source conforms to the electrical requirements of the unit.
General Cleaning Guidelines:
The aluminum and plastic housing should be kept clean at all times. All cleaning
fluids and applicators should be non-abrasive.
General Maintenance:
Always disconnect the power supply before servicing.
Keep air intake louvers clear of dirt and dust accumulation.
Check blower wheels for accumulated dirt twice a year and clean if necessary.
Please refer to the trouble shooting section for additional information on the win-
dow adjustments or service procedures.
Contact us at (800) 388-8307 for assistance or for information on the nearest service center in your area.
Quikserv Corp. quikserv.com
• 1-800-388-8307 • Fax (713) 849-5708
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Service Manual
CHF-25
Trouble Shoong Procedures
Side View
Main View
Trouble Probable Cause Probable Solution
Fan is
inoperative
1. Open circuit breaker Reset circuit breaker
2. Electricity turned off Contact power company
3. Loose cord connection Check all connections
4. Defective motor or capacitor Replace
Trouble Probable Cause Probable Solution
Excessive
Noise
1. Wheel is rubbing on housing Center wheel
2. Motor or blower not Tighten mounting bolts
securely anchored
3.Defective motor bearings Replace motor
Trouble Probable Cause Probable Solution
Insufficient Air
Flow
1. Improper voltage Reconnect to proper voltage
2. Intakes obstructed Remove obstruction
3. Dirty blower wheels Clean
Trouble Probable Cause Probable Solution
Fan Cuts Out
On Thermal
Overload (self resets)
1. Low voltage Verify correct wire size
2. Obstruction to blower wheel Remove obstruction
Trouble Probable Cause Probable Solution
No Heat
Quikserv Corp. quikserv.com
1. Improper voltage Reconnect to proper voltage
2. Defective heat switch Replace switch
3. Defective heater Replace heat strip
• 1-800-388-8307 • Fax (713) 849-5708
3