blinking and |
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| door opening |
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beeping, | b. | Room too large |
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| b. | Check for excessive size |
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temperature | c. | Ambient temperature too high |
| c. | Check for installation location |
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d. | Exhaust restricted |
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| d. | Leave minimum 3 feet clearance for | ||||||||
high or not |
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| the exhaust side and leave | |||||||
cooling and |
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| minimum 1 foot clearance for the | ||||||
running |
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| fresh air intake side |
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continually | e. | Malfunctioning fans |
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| e. | Check for both evaporator and | |||||||
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| condenser fans |
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| f. | Improper | evaporator | or | f. | Check for air restrictions |
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| condenser airflow |
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| g. | Clean condenser |
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| g. | Dirty Condenser |
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| h. | Iced evaporator |
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| h. | Defrost and reset temperature |
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| i. | Refrigeration system restriction | i. | Call | service | for |
| checking | |||||
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| restrictions |
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| j. | Refrigerant leak |
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| j. | Call service for checking loss of | |||||||
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| refrigerant |
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| k. | Undercharge or overcharge |
| k. | Call service to add or remove | ||||||||
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| refrigerant |
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| l. | Failed components |
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| l. | Check | compressor | windings, | start | ||||
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| relay and overload protector |
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7.Unit running | a. Improper room insulation & seal | a. Check | for | insulation, | gasket | and | |||||||
too long | b. Exhaust restricted |
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| door opening |
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| b. Leave minimum 3 feet clearance for | ||||||||||
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| the exhaust side and leave minimum | ||||||
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| 1 foot clearance for the fresh air | ||||||
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| intake side |
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| c. Room too large |
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| c. Check for excessive size or increase | |||||||||
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| setting |
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| d. Ambient | temperature | higher | > | d. Check | for | installation | location or | |||||
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| 90°F |
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| increase setting |
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| e. Dirty Condenser |
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| e. Clean condenser |
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8.Fan motor | a. | a. | Check for fan running time FON | ||||||||||
running but | b. | mode |
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| b. | Check for proper voltage |
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compressor | Incorrect power supply |
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c. | Incorrect or loose wirings |
| c. | Check all wirings and connections | |||||||||
not running |
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d. | Failed components |
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| d. | Check start relay, start capacitor, | ||||||||
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| overload protector, compressor. | ||||||
| e. | Liquid | refrigerant | in | the | e. | Call service for OEM information. | ||||||
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| compressor |
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9.Compressor | a. | Fan blade stuck |
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| a. | Check for proper clearance |
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running but | b. | Incorrect or loose wirings |
| b. | Check all wirings |
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| open or | |||||
fan not | c. | Failed motors |
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| c. | Call service for checking | |||||||
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| shorted windings |
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running |
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10.Evaporator | a. | Evaporator air flow restriction |
| a. | Check for fans |
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| ||||
Icing | b. | Not stopping due to air leak, high | b. | Check for seal, door opening, | |||||||||
|
| ambient | temperature | or low |
| ambient temperature and setting | |||||||
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| setting |
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| c. | Low ambient temperature |
| c. | Defrost unit |
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| |||
| d. | Bad thermostat or sensor |
| d. | Check for thermostat and sensor | ||||||||
| e. | Moisture in the system |
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| e. | Working initially then stopping |
| ||||||
| f. | Refrigerant low or leaking |
| f. | Check | for | current | and | sealed | ||||
- 15 -
