V1.0
Single-Phase Electric Air Compressor
9033895
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17
2. Air receiver
is at full
pressure
2. Drain air
receiver
Low pressure
1. Safety valve
leaks
2. Drain cock
open
3. Loose tubes or
fittings
4. Dirty or
plugged air
filter
5. Defective
unloader valve
1. Replace safety
valve
2. Close drain
cock
3. Tighten
fittings
4. Clean or
replace
5. Replace
unloader valve
Oil in
discharge
1. Too much oil
in crankcase
2. Improper oil
viscosity
3. Compressor is
overheated
4. Restricted air
filter
5. Worn piston
rings
1. Drain oil and
fill to proper
level
2. Drain and
replace with
proper oil
3. Air pressure
regulated too
high
4. Clean or
replace air
filter
5. Replace piston
rings
Compressor
overheats
1. Dirty
compressor
head, cylinder
or intercooler
2. Clogged inlet
filter
1. Clean with
compressed air
2. Clean or
replace as
necessary