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Operating Instructions and Parts Manual
www.chpower.com
Troubleshooting Chart
Symptom Possible Cause(s) Corrective Action
Compressor will not run 1. Switch in OFF position 1. Make sure compressor is plugged in and
switch is ON
2. No electrical power at wall outlet 2. Check circuit breaker or fuse at electrical
panel
3. Compressor has reached automatic shut-
off pressure
3. Release air from tank until compressor
restarts automatically
4. Motor overheated/overworked 4. Switch unit to OFF, wait 30 minutes to cool,
turn ON again to resume work. Make sure
compressor is run in a clean, well-ventilated
area where temperature will not exceed
100°F.
5. Loose electrical connection 5. Check all electrical connections
6. ON / OFF switch bad 6. Replace ON / OFF switch
7. Pressure switch bad 7. Replace pressure switch
8. Defective motor 8. Replace pump / motor assembly
Thermal overload protector
cuts out repeatedly
1. Lack of proper ventilation/room
temperature too high
1. Move compressor to a clean, well ventilated
area where temperature will not exceed
100°F.
2. Excessive air usage, compressor too small 2. Decrease usage or purchase unit with higher
air delivery (SCFM)
Tank pressure drops when
compressor shuts off
1. Open tank drain valve 1. Close tank drain valve
2. Loose connections (fittings, tubing, air
hose, any connections, etc.)
2. Check all connections with soap and water
solution. If a leak is detected, tighten.
Or remove fitting and apply pipe tape to
threads and reassemble.
Do not disassemble check
valve. With air in tank,
bleed tank first.
3. Tank leaks 3. Check entire tank for leaks with soap and
water solution.
Compressor runs
continuously / air output
lower than normal
1. Excessive air usage, compressor too small 1. Decrease usage or purchase unit with higher
air delivery (SCFM)
2. Open tank drain valve 2. Close tank drain valve
3. Loose connections (fittings, tubing, air
hose, any connections, etc.)
3. Check all connections with soap and water
solution. If a leak is detected, tighten.
Or remove fitting and apply pipe tape to
threads and reassemble.
4. Pump wore out 4. Replace pump / motor assembly
Excessive moisture in
discharge air
1. Excessive water in tank 1. Drain tank, tilt tank to remove moisture
2. High humidity 2. Move to area of less humidity; use air line
filter
Safety valve pops open 1. Defective pressure switch 1. Replace pressure switch
2. Defective safety valve 2. Replace safety valve with genuine
replacement part