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