TROUBLESHOOTING GUIDE:
Compressor runs
continuously and air flow
lower than normal
1. Excessive air usage
2. Loose connections
3. Worn piston ring or inlet valve.
4. Clogged air filter element
1. Decrease air usage
2. Check all connections with
soap and water solution
and tighten.
3. Replace compressor
4. Replace air filter element
Compressor runs
continuously
1. Faulty pressure switch
1. Replace pressure switch
Compressor will not run
1. No power, or power switch
in OFF position
2. Blown fuse
3. Motor overheats
4. Faulty pressure switch
(if hooked up to a
pressure switch).
1. Make sure compressor
switch is ON
2. Disconnect compressor
from power source, replace
fuse. (Refer to Specifications
section for correct
fuse amperage)
3. Let compressors cool off for
about 30 minutes to allow
thermal overload switch to reset.
4. Replace pressure switch
Thermal overload
protector cuts out
repeatedly
1. Lack of proper ventilation or
ambient temperature is too high
2. Compressor valves failed
1. Move compressor to well
ventilated area, or area with
lower ambient temperature
2. Replace compressor
Excessive knocking
or rattling
1. Loose mounting bolts
2. Worn bearing on eccentric or
motor shaft
3. Cylinder or piston ring is worn
1. Tighten bolts
2. Replace bearing or
piston assembly
3. Replace piston or compressor
CAUTION: NEVER DISASSEMBLE COMPRESSOR WHILE
COMPRESSOR IS PRESSURIZED.
USER MANUAL
400H-A - 450H-A Hardmount Automatic Air Compressor Kit
PROBLEM:
POSSIBLE CAUSE(S)
CORRECTIVE ACTION