Troubleshooting Guide; Corrective Action - Speedaire SDR7PC18 Manuel D'utilisation Et Carnet De Pièces Détachées

TROUBLESHOOTING GUIDE

Symptom
Compressor will not run
Motor hums but cannot run or
runs slowly
Fuses blow/circuit breaker trips
repeatedly
Thermal overload protector cuts
out repeatedly
Air tank pressure drops when
compressor shuts off
Excessive moisture in discharge
air
Compressor runs continuously
Compressor vibrates
Air output lower than normal
Possible Cause(s)
1. Unit is plugged into extension
cord
2. No electrical power
3. Blown fuse
4. Breaker open
5. Thermal overload open
6. Pressure switch bad
1. Low voltage
2. Unit is plugged into extension
cord
3. Shorted or open motor winding
4. Defective check valve or
unloader
1. Incorrect size fuse, circuit
overloaded
2. Unit is plugged into extension
cord
3. Defective check valve or
unloader
1. Low voltage
2. Clogged air filter
3. Lack of proper ventilation / room
temperature too high
4. Unit is plugged into extension
cord
1. Loose connections (fittings,
tubing, etc.)
2. Loose drain lock
3. Check valve leaking
1. Excessive water in air tank
2. High humidity
1. Defective pressure switch
2. Excessive air usage
3. Worn piston ring
Loose mounting bolts
1. Broken inlet valves
2. Intake filter dirty
3. Connections leaking

Corrective Action

1. Remove extension cord
2. Plugged in? Check fuse/breaker or motor overload
3. Replace blown fuse
4. Reset, determining why problem happened
5. Turn off compressor and wait 20 minutes. Motor will restart when
cool
6. Replace
1. Check with voltmeter
2. Remove extension cord
3. Replace motor
4. Replace or repair
1. Check for proper fuse, use time-delay fuse. Disconnect other
electrical appliances from circuit or operate compressor on its
own branch circuit
2. Remove extension cord
3. Replace or repair
1. Check with voltmeter
2. Clean filter (see Maintenance section)
3. Move compressor to well ventilated area
4. Remove extension cord
1. Check all connections with soap and water solution and tighten
2. Tighten
3. Disassemble check valve assembly, clean or replace
Do not disassemble check valve
with air in tank; bleed tank first.
1. Drain tank
2. Move to area of less humidity; use air line filter
1. Replace switch
2. Decrease air usage; compressor not large enough for a
requirement
3. Replace piston
Tighten
1. Have authorized service representative repair unit
2. Clean or replace intake filter
3. Tighten connections
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