Troubleshooting
Error Error
Error
Location Location
Location
Type Type
Type
Description Description
Description
Cause Cause
Cause
Solution Solution
Solution
Flowistoohighat
currentsetpoint.
Useasmallermixchamberthat
isratedfortheunitinuse.If
recirculating,decreaseowor
decreasetemperaturesetpoint.
Looseormissing
jumperonthe
heaterterminal
blocks
Reconnectorinstalljumper.
BadRTDorbad
RTDplacement
againstheater.
SwapAandBheateroutputcables
andRTDcablesandseeifissue
follows.Ifso,replaceRTD.
Looseheaterwires
orconnector.
Checkforlooseheaterelementwires
orloosegreenconnectoratTCM.
T2DAHeaterALow
Temperature
A
Badheater
element.
Conrmresistanceofheater.Heater
resistanceshouldbe18-21Ωforeach
heaterelement,9-12Ωcombined
for10kWsystems,6-8Ωfor15
kWsystems,and4-6Ωfor20kW
systems.Ifoutoftolerance,replace
heaterelement.
Flowistoohighat
currentsetpoint.
Useasmallermixchamberthat
isratedfortheunitinuse.If
recirculating,decreaseowor
decreasetemperaturesetpoint.
Looseormissing
jumperonthe
heaterterminal
blocks
Reconnectorinstalljumper.
BadRTDorbad
RTDplacement
heater.
SwapAandBheateroutputcables
andRTDcablesandseeifissue
follows.Ifso,replaceRTD.
Looseheaterwires
orconnector.
Checkforlooseheaterelementwires
orloosegreenconnectoratTCM.
T2DBHeaterBLow
Temperature
B
Badheater
element.
Conrmresistanceofheater.Heater
resistanceshouldbe18-21Ωforeach
heaterelement,9-12Ωcombined
for10kWsystems,6-8Ωfor15
kWsystems,and4-6Ωfor20kW
systems.Ifoutoftolerance,replace
heaterelement.
Coldchemicalin
unheatedportionof
systempassed
hoseFTSat
startup.
Recirculateheatedchemicalbackto
drumincoldconditionsbeforestartup.
T2DHHoseLow
Temperature
Hose
Flowistoohighat
currentsetpoint.
Useasmallermixchamberthat
isratedfortheunitinuse.If
recirculating,decreaseowor
decreasetemperaturesetpoint.
333024S
27