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Speedaire Operating Instructions and Parts Manual
Model 1NNF8
Troubleshooting Chart
Symptom
Possible Cause(s)
Compressor will not
1. No electrical power
run
2. Breaker open
3. Pressure switch bad
4. Motor over worked
5. Tank pressure above cut-in
Fuses blow/circuit
1. Incorrect size fuse, circuit overloaded
breaker trips
repeatedly
2. Extension cord usage - wrong gauge
wire and/or too long.
3. Worn check valve
4. Defective unloader valve (on
pressure switch)
5. Defective motor capacitor(s)
6. Defective motor
Tank pressure drops
1. Loose connections (fi ttings, tubing,
when compressor
etc.)
shuts off
2. Open tank drain valve
Air output lower
1. Excessive air usage
than normal/low
2. Clogged intake fi lter
discharge pressure
3. Open tank drain valve
4. Air leaks in piping (on
machine or in outside system)
5. Piston ring worn
6. Broken valve (in pump)
Excessive moisture
1. Excessive water in tank
in discharge air
2. High humidity
Compressor runs
1. Defective pressure switch
continuously
2. Excessive air usage
Motor hums but
1. Circuit overloaded
cannot run or runs
slowly
2. Extension cord usage - wrong
gauge wire and/or too long.
3. Loose electrical connections
4. Worn check valve
5. Defective unloader valve
(on pressure switch)
6. Defective motor capacitor(s)
7. Defective motor
Thermal overload
1 Lack of proper ventilation / room
temperature too high
protector cuts out
2. Clogged intake fi lter
repeatedly
3. Circuit overloaded
4. Extension cord usage - wrong gauge
wire and/or too long.
5. Worn check valve
6. Defective unloader valve
7. Defective motor
Corrective Action
1. Plugged in? Switch on? Check fuse/breaker
2. Reset, determine cause of problem
3. Replace
4. Turn off, let cool, turn on.
5. Bleed tank pressure down to cut-in.
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 check valve
4. Replace unloader valve.
5. Replace capacitor(s)
6. Replace motor
1. Check all connections with soap and water solution. Tighten; or remove
and apply pipe dope or pipe tape to the threads, then reassemble.
2. Close tank drain valve
1. Decrease air usage; compressor not large enough for air requirement
2. Clean or replace fi lter
3. Close tank drain valve
4. Check all connections with soap and water solution. Tighten; or remove
and apply pipe dope or pipe tape to the threads, then reassemble.
5. Replace piston and cylinder.
6. Replace valve
1. Drain tank
2. Move to area of less humidity; use air line fi lter
1. Replace switch
2. Decrease air usage; compressor not large enough for air requirement
1. Disconnect other electrical appliances from circuit or operate compressor
on its own branch circuit
2. Remove extension cord
3. Check all electrical connections
*
4. Replace check valve
5. Replace unloader valve
6. Replace capacitor(s)
7. Replace motor
1. Move compressor to well ventilated area
2. Clean or replace fi lter
3. Check for proper fuse, use time-delay fuse. Disconnect other electrical
appliances from circuit or operate compressor on its own branch circuit
4. Remove extension cord
*
5. Replace check valve
6. Replace unloader valve.
7. Replace motor
*
7
*
*
*
Do not disassemble check valve
with air in tank; bleed tank.
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