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FP204100
www.chpower.com
Troubleshooting Chart
Symptom Possible Cause(s) Corrective Action
Compressor will not run 1. Switch in OFF position
2. No electrical power at wall outlet
3. Compressor has reached automatic shut-
off pressure
4. Motor overheated
5. Blown fuse (inside pump cover)
6. Pressure switch bad
1. Make sure compressor is plugged in and
switch is ON
2. Check circuit breaker or fuse at electrical
panel.
3. Release air from tank until compressor
restarts automatically
4. Allow compressor to cool for approximately
30 minutes so thermal overload switch
will reset. Make sure compressor is run
in a clean, well-ventilated area where
temperature will not exceed 100°F.
5. Disconnect compressor from power source
then remove pump cover. Replace fuse –
Part. No. FP200352AV. If replacement fuse
blows, call 1-800-543-6400.
6. Replace pressure switch
Knocks, rattles, excessive vibration 1. Tank not level
2. Defective bearing on eccentric or motor
shaft
3. Cylinder or piston ring is worn or scored
1. Shim tank to level position
2. Replace pump assembly
3. Replace pump assembly
Tank pressure drops when compressor
shuts off
1. Loose drain valve
2. Check valve leaking
3. Loose connections (fittings, tubing, etc.)
1. Tighten drain valve
2. Replace check valve
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.
Do not disassemble
check valve. With air
in tank, bleed tank first.
Compressor runs continuously and air
output is lower than normal/low
discharge pressure
1. Excessive air usage, compressor too small
2. Loose connections (fittings, tubing, etc.)
3. Broken inlet valves
4. Piston ring worn
1. Decrease usage or purchase unit with
higher air delivery (SCFM)
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.
3. Replace pump assembly
4. Replace piston assembly
Excessive moisture in discharge air 1. Excessive water in tank
2. High humidity
1. Drain tank, tilt tank to remove moisture
2. Move to area of less humidity; use air line
filter
NOTE: Water condensation is not caused by
compressor malfunction