Operating instructions

14
SYMPTOM CAUSE REFER TO PAGE
This program will address the most common system problems associated with the
Duo-Therm Basement AirDuo-Therm Basement Air
Duo-Therm Basement AirDuo-Therm Basement Air
Duo-Therm Basement Air
Conditioners and Heat PumpsConditioners and Heat Pumps
Conditioners and Heat PumpsConditioners and Heat Pumps
Conditioners and Heat Pumps supplied by The Dometic Corporation. Our intent is to provide you with a guideline
of checks to make, should you encounter one of the following symptoms.
Operation 1F 74
AC Volts 1B 26
Breaker 3B 26
Wiring 13B 31
Transformer 10F 96
Thermostat 7F/A-7F/B 80
Operation 1F 74
Thermostat 7F/A-7F/B 80
Wiring 13B 31
Relay 14F/H 99
Compressor 5C 36
AC Volts 1B 26
PTCR 4C 36
Start Capacitor 3C 36
Run Capacitor 2C 35
Overload Protector 6C 37
Compressor 5C 36
Short Cycle 9C 38
Air Flow Obstructions 10C 38
Air Distribution System 11C 38
Overload Protector 6C 37
Compressor 5C 36
Refrigerant System 13C 45
Wiring 13B 31
Thermostat 7F/A-7F/B 80
Relay 14F/F 99
Run Capacitor 2C 35
Motor 1C 34
Operation 1F 74
Air Flow Obstruction 10C 38
Air Distribution System 11C 38
Low Charge 14C 47
Capillary Tube Blockage 14C 47
Evaporator Blockage 14C 47
Air Flow Obstruction 10C 38
Air Distribution System 11C 38
Heat Gain/Heat Loss 12C/B 44
Refrigerant System 13C 45
Compressor 5C 36
Air Flow Obstruction 10C 38
Air Distribution System 11C 38
MODEL 390XX.XXX SECTION
1. Unit does not run: No fan, no compressor
2. Fan operates: Compressor will not come on (does
not "hum")
3. Fan operates: Compressor tries to start, cycles
"OFF" and "hums" again, or blows circuit breaker.
4. Fan operates: Compressor runs for a short while,
cycles "OFF", cycles back "ON".
5. Compressor runs: No fan
6. Evaporator freezes
7. Insufficient cooling, compressor runs constantly
8. Insufficient cooling with reduced air output
DUO-THERM BASEMENT AIR CONDITIONERS & HEAT PUMPS