User guide

TROUBLESHOOTING
SYMPTOM AND
PROBABLE CAUSE
PROBABLE REMEDY
COMPRESSOR DOES NOT RUN
Opening in Power Circuit
1. Controi off
2. Biown fuse
3. Defective wiring
4. Defective service cord
5. Loose eiectricai connections
6. Faulty switches, thermostat, or fan
1 Reset control button
2. Replace fuse.
3 Replace wiring.
4 Replace service cord
5. Tighten connections.
6. Replace defective component.
Compressor Power Supply Open
1. Loose leads at compressor terminals
2. Defective motor overload switch
3. Defective capacitor
4. Open compressor windings
5. Seized compressor
1 Tighten leads.
2. Replace switch
3 Replace capacitor
4 Replace compressor
5. Replace compressor
COMPRESSOR RUNS BUT CYCLES
Fan Operating Erratically
1. Loose lead at fan motor
2. Defective or burned out motor
3. Outdoor air restricted or recirculating
4. Overcharge or noncondensables in system
5. Restricted discharge line
6. Defective motor overload switch
1. Tighten lead
2. Repair or replace motor
3. Check for dirty filter, proper clearances around unit —
remove any obstructions
4 Reclaim refrigerant, evacuate and recharge system according to
nameplate specifications.
5. Check for obstruction in line, replace tubing if required.
6 Replace switch.
Cycles on Compressor Overload
1. Defective run capacitor
2. Defective compressor bearings or valves
3. Greatly restricted indoor air (iced indoor coil)
4. Low refrigerant charge
5. Indoor capillary restricted
6. Liquid line restricted
7. Compressor hot
8. Weak or inconsistent line power
1 Replace capacitor.
2. Replace compressor
3 Defrost indoor coil.
4 Add charge according to approved method.
5. Replace capillary.
6. Replace strainer
7. Verify refrigerant charge.
8. Check line voltage at time of compressor start-up
INSUFFICIENT COOLING
Cooling Air Not Adequate
1. Dirty filter or coil
2. Iced indoor coil (slightly low refrigerant charge)
3. Defective fan motor
1. Clean as required
2. Recharge.
3. Replace fan motor.
Condenser Air Not Adequate
1. Outside air restricted
2. Dirty coil
3. Defective fan motor
1. Check for obstructions and dirty filter. Remedy as required.
2 Clean coil.
3. Replace fan motor.
Unit Undersized
Re-evaluate unit for proper capacity
Air Leakage
Check caulking around sleeve Repair if necessary.
Capillary Restricted
Replace capillary.
Compressor Flooding
1. Unit overcharged
2. Low indoor airflow
1 Reclaim refrigerant, evacuate and recharge system according to
nameplate specifications.
2 Clean filter and/or evaporator coil
AIR SWEEP NOT WORKING
1. Linkage in upper control box stuck
2. Air sweep motor failure
1 Lubricate linkage. Check for proper assembly
2 Replace motor
HEATER CYCLES ON LIMIT SWITCH
1. Dirty filter
2. Blocked indoor air inlet
3. Low airflow due to fan motor speed
1 Clean or replace filter
2 Remove blockage.
3 Check fan motor. Repair or replace as necessary.
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