VIAIR 485C - Troubleshooting Guide

485C COMPRESSOR KIT
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
airlinelter
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compressor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
PROBLEM:
POSSIBLECAUSE(S) CORRECTIVEACTION