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| If the breaker remains set, check to see if compressor is |
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| running and condenser fan turns on. |
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| After compressor runs a few minutes, check the |
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| refrigerant “sight glass” in the ¼” copper tubing. Look |
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| for bubbles. |
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| If no bubbles are present and compressor is running, |
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| refrigerant system is running OK. |
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| If bubbles are present, system is low on refrigerant. |
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| A CERTIFIED HVAC service technician will have to locate |
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| and repair any refrigerant leaks, then add refrigerant. |
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| Condenser fan should come on either immediately on |
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| compressor start or after sight glass gets warm. |
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| If not, compressor will trip off on high pressure safety |
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| control, reducing capacity and possibly tripping the |
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| breaker. |
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| In this event, CERTIFIED HVAC service technician will |
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| have to check for the problem. |
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|
Compressor runs intermittently |
| |
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|
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| 1. Fan coil blower | Evaporator coil will probably be iced. |
| not running with | Call a CERTIFIED HVAC service technician. |
| compressor |
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|
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| 2. Fan coil blower | • Increase speed control setting if equipped. |
| running too slow or air | • Clean coil if necessary, remove obstructions. |
| flow blocked. | • Coil icing can occur. |
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|
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| 3. Condenser coil | Clean coil and fan thoroughly, clear any obstructions |
| blocked with dirt or | and/or cause for hot air recirculation. |
| other matter. |
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|
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| 4. Condenser fan | Call a CERTIFIED HVAC service technician to diagnose |
| motor bearings faulty | and repair. |
| causing motor to trip on |
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| overload, followed by |
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| compressor cycling off. |
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|
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| 5. Hot air, above 125°, | Provide source of cool air to condenser space in |
| entering condenser from | accordance with directions in this manual. |
| confined space (outer |
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| room) |
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|
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| 6. System refrigerant | Call a CERTIFIED HVAC service technician to diagnose |
| overcharge. | and recover excess refrigerant. |
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