Use and Care Manual

7
TROUBLESHOOTING GUIDE
A) Water downstream of dryer
B) High pressure drop across
dryer
C) Fault Alarm
D) Refrigeration system not func-
tioning properly
1. Whendryeron/offswitchinonor
"I"position
2. Refrigerantcompressorcycleson
andoff
1. Residualfreemoistureremainingin
downstream pipelines
2. Airby-passsystemisopen
3. InletandOutletconnectionsare
reversed
4. Temperaturessurroundingair
linesdownstreamofdryerhave
dropped below dryers dew point
rating.
5.Excessivefreemoisture(bulkliquid)
at dryer inlet
6.Condensatenotbeingautomati-
cally drained
 Drainmechanismiscloggedor
inoperative.
Drainlineisrestrictedorfrozen.
7.Dryeroverloadedresultinginel-
evated dew point.
8. Refrigerationsystemnotfunction-
ing properly resulting in elevated
dew point.
1. Inletairstrainerclogged
2.Excessiveairow
3.Separatorlterclogged.
4.Freezingofmoistureinevaporator
becauseofrefrigerationsystem
improperlyfunctioning.
1.Dryeroverloadedresultinginhigh
air outlet temperature.
2.Refrigerationsystemnotfunction-
ing properly resulting in high air
outlet temperature.
3.Unitfunctioningnormallybutther-
mostaticswitchismalfunctioning
or not securely mounted.
a. Powerfailure
b. Line disconnect switch open
c. Blownfuses,openbreaker
d.Faultywiring,looseterminals
a. Highorlowambientconditions
b.Ambientairlterclogged
c. Condensernsclogged
d.Fanmotororfancontrolswitch
malfunction
e. Refrigerantleak
f. Lowvoltage
Blow out system with dry air
Checkvalvepositions
Checkforcorrectconnection
Insulateorheattraceairlinesexposed
to low ambients or dry air to lower
dew point
Installseparatoraheadofdryer
Replacedrainmechanismifinopera-
tive
Open drain line
Checkinletairtemperatureandpres-
sure,owrate(compressorcapacity)
and ambient air temperature
SeeDbelow
Cleaninletairstrainer
Checkowrate
Replaceltersleeve
SeeDbelow
SeeA7
SeeDbelow
Contactqualiedrefrigerationrepair-
manormanufacturer’sservicedepart-
ment
Checkpowertounit
Closedisconnectswitch
Checkforcontinuity
Haveelectriciancheckelectricalcon-
nections
Checkminimum/maximumtempera-
ture ranges
Cleanambientairlter
Cleancondenser
Replacefanmotororfancontrol
switch
Contactqualiedrefrigerationrepair-
manormanufacturer'sservicedepart-
ment
Checkwiring
SYMPTOM POSSIBLE CAUSE(S) CORRECTIVE ACTION