21
TROUBLE
PROBABLE CAUSE
REMEDY
Thermal overload
protector cuts out
repeatedly
Air tank pressure
drops when com-
pressor shuts off
Excessive moisture
in discharge air
Compressor runs
continuously
Compressor vibrates
Air output lower than
normal
1. Low voltage
2. Clogged air filter
3. Lack of proper ventila-
tion/room temperature
too high
4. Unit is plugged into
extension cord
1. Loose connections (fit-
tings, tubing, etc.)
2. Tank drain valve open
3. Check valve leaking
1. Excessive water in air
tanks
2. High humidity
1. Defective pressure
switch
2. Excessive air usage
Loose mounting bolts
1. Broken inlet valves
2. Intake filter dirty
3. Connections leaking
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. Close valve
3. Disassemble check valve
assembly, clean or replace
Do not disassemble
check valve with air in
tank; bleed tank
1. Drain tanks
2. Move to area of less
humidity; use air line filter
1. Replace switch
2. Decrease air usage; com-
pressor not large enough
for a requirement
Tighten
1. Have authorized service
representative repair unit
2. Clean or replace intake fil-
ter
3. Tighten connections
!
DANGER:
