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CLIMATE
CONTROL
Commercial Refrigeration Parts
The name behind the brands you trust.
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Commercial Refrigeration Parts
InterLink is your link to a complete line of dependable and certied commercial refrigeration parts, accessories and innovative electronic controls for all Heatcraft
Refrigeration Products (HRP) brands - including Bohn, Larkin, Climate Control and Chandler. At InterLink, we provide our wholesalers with a comprehensive
selection of product solutions and innovative technologies for the installed customer base. And every product is built to ensure the same high performance
standards with which all HRP brands are built — backed by a dedicated team to serve every customer need, delivering at the best lead times in the industry.
Replacement parts should be obtained from your local InterLink wholesaler. Replacement parts, which are covered under the terms of the warranty statement
on page 2 of this manual, will be reimbursed for total part cost only. The original invoice from the parts supplier must accompany all warranty claims for
replacement part reimbursement. Heatcraft Refrigeration Products reserves the right to adjust the compensation amount paid on any parts submitted
for warranty reimbursement when a parts supplier's original invoice is not provided with a claim. For more information, call 800-686-7278 or visit
www.interlinkparts.com.
Replacement Parts by
H-IM-UC-0808
Table 3. Evaporator Troubleshooting Chart
SYMPTOMS POSSIBLE CAUSES POSSIBLE CORRECTIVE STEPS
Fan(s) will not operate. 1. Main switch open.
2. Blown fuses.
3. Defective motor.
4. Defective timer or defrost thermostat.
5. Unit in defrost cycle.
6. Coil does not get cold enough to reset thermostat.
1. Close switch.
2. Replace fuses. Check for short circuits or overload conditions.
3. Replace motor.
4. Replace defective component.
5. Wait for completion of cycle.
6. Adjust fan delay setting of thermostat. See Defrost
Thermostat Section of this bulletin.
Room temperature too high. 1. Room thermostat set too high.
2. Superheat too high.
3. System low on refrigerant.
4. Coil iced-up.
5. Unit cooler located too close to doors.
6. Heavy air inltration.
1. Adjust thermostat.
2. Adjust thermal expansion valve.
3. Add refrigerant.
4. Manually defrost coil. Check defrost controls for malfunction.
5. Relocate unit cooler or add strip curtain to door opening.
6. Seal unwanted openings in room.
Ice accumulating on ceiling
around evaporator and/or on
fan guards venturi or blades.
1. Defrost duration is too long.
2. Fan delay not delaying fans after defrost period.
3. Defective defrost thermostat or timer.
4. Too many defrosts.
1. Adjust defrost termination thermostat.
2. Defective defrost thermostat or not adjusted properly.
3. Replace defective component.
4. Reduce number of defrosts.
Coil not clearing of frost during
defrost cycle.
1. Coil temperature not getting above freezing point
during defrost.
2. Not enough defrost cycles per day.
3. Defrost cycle too short.
4. Defective timer or defrost thermostat.
1. Check heater operation.
2. Adjust timer for more defrost cycles.
3. Adjust defrost thermostat or timer for longer cycle.
4. Replace defective component.
Ice accumulating in drain pan 1. Defective heater.
2. Unit not pitched properly.
3. Drain line plugged.
4. Defective drain line heater.
5. Defective timer or thermostat.
1. Replace heater.
2. Check and adjust if necessary.
3. Clean drain line.
4. Replace heater.
5. Replace defective component.
Uneven coil frosting 1. Defective heater.
2. Located too close to door or opening.
3. Defrost termination set too low.
4. Incorrect or missing distributor nozzle.
1. Replace heater.
2. Relocate evaporator.
3. Adjust defrost termination setting higher.
4. Add or replace nozzle with appropriately sized
orif ice for conditions.
Defrost Thermostat
Expansion Valves & Nozzles
Refrigerant Oils
Recommended Refrigerant Piping Practices
Line Sizing Charts
Hot Gas Defrost Systems
Evacuation and Leak Detection
Refrigerant Charging Instructions
System Balancing — Compressor Superheat
General Sequence and Operation
Troubleshooting Guides
Preventive Maintenance Guidelines
Typical Wiring Diagrams
For more detailed information on the following topics, please visit http://heatcraftrpd.com/service/publibrary.asp
for our complete Refrigeration Systems Installation and Operation Manual (H-IM-64L).