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Page 18 GSM-01 081310
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 o 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. Evaporator Unit
blower not running with
compressor
Evaporator coil will probably be iced.
Call a CERTIFIED HVAC service technician.
2. Evaporator Unit
blower running too slow
or air ow 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/
or cause for hot air recirculation.
4. Condenser fan
motor bearings faulty
causing motor to trip on
overload, followed by
compressor cycling o.
Call a CERTIFIED HVAC service technician to diagnose and
repair.
5. Hot air, above 125°,
entering condenser from
conned 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.