4. Cabinet Defrost
Problem | Possible Cause |
|
| Remedy | ||
[1] | Cabinet fan motors | a) Cabinet Fan Relay | 1. | Bad contacts (closed). | 1. | Check for continuity and |
| on. |
|
|
|
| replace. |
|
| b) Control Board | 1. | Defective. | 1. | Replace. |
[2] | Evaporator does | a) Defrost Thermistor | 1. | Defective. | 1. | See "II.E. Thermistor |
| not defrost |
|
|
|
| Check." |
| completely. | b) Defrost | 1. | Not enough defrosts | 1. | Factory default is once |
|
|
|
| occurring per day. |
| every 6 hours. See "II.D.5. |
|
|
|
| Operation in humid |
| Service Menu." |
|
|
|
| conditions. |
|
|
|
| c) Defrost Heater | 1. | Defective. | 1. | Replace heater. |
|
| d) Defrost Thermostat | 1. | Defective, turning off | 1. | Replace defrost thermostat. |
|
|
|
| heaters prematurely, |
|
|
|
|
|
| or fused open. |
|
|
|
| e) Cabinet Liquid Line | 1. | Does not close. | 1. | Check and replace. |
|
| Valve |
|
|
|
|
[3] | Defrost cycle too | a) Defrost | 1. | Not enough defrosts | 1. | Factory default is once |
| long. (E3 Defrost |
|
| occurring per day. |
| every 6 hours. See "II.D.5 |
| Alarm) |
|
| Operation in humid |
| Service Menu." |
|
|
|
| conditions. |
|
|
|
| b) Defrost Thermistor | 1. | Defective. | 1. | Replace. |
|
| c) Defrost Heater | 1. | Defective. | 1. | Replace heater. |
|
| d) Defrost Thermostat | 1. | Defective, turning off | 1. | Replace defrost thermostat. |
|
|
|
| heaters prematurely, |
|
|
|
|
|
| or fused open. |
|
|
|
| e) Control Board | 1. | Defective. | 1. | Replace. |
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