Munters ICEDRY 800 - Fault Tracing; General; Safety; Fault Tracing List

IceDry800/1400
7Faulttracing
7.1General
Thepurposeofthischapteristoprovideguidanceinbasicfaulttracingandprovideinstructionsfor
correctiveactionstoremedyanyfaults.GothroughthelistbelowbeforecontactingMuntersService.
7.2Safety
W W
W
ARNING! ARNING!
ARNING!
Adjustments,maintenanceandrepairsmustonlybecarriedoutbyqualiedpersonnel.
W W
W
ARNING! ARNING!
ARNING!
Alwaysswitchoffthemainpowerswitchbeforeremovingtheunit'spanels.
7.3Faulttracinglist
Seethewiringdiagramforidenticationofelectricalcomponents.
Fault
symptom
Indica-
tors
Possiblecause
Correctiveaction
Powersupplyfailure.Checkthepowersupplytotheunit.
IfthetimeofthepowerfailureisnotknownseesectionRestartafterpower
failureorcallMuntersServicebeforestartup.
CircuitbreakerQM25trippeddue
toawiringfault.
Ifobservedimmediately,resetthecircuitbreaker.
Mainpowerswitch(no.1)issetto
”0”.
Setthemainsupplyswitchto”1”andcheckthatthemainconnection
indicator(no.14)islit.
Unithas
stopped.
Alloff.
TransformerTC25fuseFU26
failure.
Investigatethecauseofthefault,andrectify.Replacethefuse.Ifthefault
re-occurs,contactMunters.
CircuitbreakerQM25trippeddue
toawiringfault.
Investigatethecauseofthefault,andrectify.ResetQM25.
Unithas
stopped.
No.12
doesnot
ash.
Theunithasbeensetto
AUTomaticmodebymistake.
SetthemodeswitchtoMANual,andcheckthattheunitstarts.
Unithas
stopped.
No.12,
6and
7are
ashing.
Ifbothindicators6and7are
ashing,itindicatesthat
one(orboth)ofthehigh
temperaturecut-outs(BT27
andBT30)havetripped,due
toeitheranobstructioninthe
reactivationairow,orbecause
thereactivationairowhasbeen
settoolow.
Leavetheunittocooldown.
ResetQM12andQM14circuitbreakersasrequired.
Checkthattheairinletandoutletductsandltersarefreefromobstructions
andarenotblockedbyiceordirt.
SetthemainsupplyswitchtoONtoresetthefaultwarning.Adjustthe
reactivationairow.
Switchoffthemainsupplyandallowtheunittocooldown.
Investigatethecauseofthefault,andrectify.
ResetQM12andQM14asrequired.
Unithas
stopped.
No.12
and
either6
or7are
ashing.
Safetydevicehavetrippeddueto
aheaterelementorwiringfault.
Switchonthemainsupplyatthemainsupplyswitchtoresetthefault
warning.
NOTE!Themainpowerswitchmustbeonforatleast12hoursbefore
thestart.Thistimeisrequiredtolettheinternalheatequipmentremove
possibleicebuiltup.
24Faulttracing190TGB-1037-G1307