VIAIR 28021 - Troubleshooting Common Issues

TROUBLESHOOTING GUIDE:
Tank pressure drops when
compressor(s) shut off
1.Loosedraincock
2.Checkvalveleaking
3.Looseconnections
1. Tighten drain cock
2.Replacecheckvalveor
compressor
3.Checkallconnectionswith
soap and water solution
and tighten
Compressorruns
continuouslyandairow
lower than normal
1.Excessiveairusage
2.Looseconnections
3. Worn piston ring or inlet
valve.
4.Cloggedairlterelement
1. Decrease air usage
2.Checkallconnectionswith
soap and water solution
and tighten.
3.Replacecompressor
4.Replaceairlterelement
Compressorruns
continuously causing
safetyvalve(ifequipped)
to open
1. Faulty pressure switch
2.Defectivesafetyvalve
1.Replacepressureswitch
2.Replacesafetyvalve
Excessivemoisturein
discharge
1.Excessivewaterinairtank
2.Highhumidity
1. Drain tank, tilt tank to drain.
Draintankmorefrequently
2.Movecompressortoarea
with less humidity, or use
water separator
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Specications
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
280C Air Compressor Kit
PROBLEM: POSSIBLECAUSE(S) CORRECTIVEACTION