Carrier 33CSSP3-FC - Troubleshooting

Troubleshooting
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• SYMPTOM: The fan will not run in all three speeds or switches speeds in an
improper order.
CAUSE: Incorrect wiring between the thermostat and the relay board, or
between the relay board and the fan wires.
REMEDY:Recheckthewiring(G=lowspeed,G2=mediumspeed,G3=high
speed).
• SYMPTOM:Coldwatervalveopensforeitheracooloraheatdemandina4-pipe
system.
CAUSE: The thermostat has been programmed for the incorrect type of fan coil.
REMEDY: Conrm that you have entered the correct programming for your type
offancoilsystem(steps#5and#6,page19oftheOwner’sManual).
• SYMPTOM:Thewatervalvedoesnotopenatallin2-pipecongurations.
CAUSE: The thermostat has been programmed for the incorrect type of fan coil
system or the fan coil is not wired to the thermostat correctly.
REMEDY:Programthethermostatfora2-pipefancoil(step#5,page19of
theOwner’sManual).Also,makecertainthatthewatervalveiswiredtotheY1
terminal.
• SYMPTOM:Thethermostatdisplayonlyshowsclock.
CAUSE: The thermostat has been programmed for a minimal display.
REMEDY:ProgramthethermostatforFullDisplay(step#3,page18ofthe
Owner’sManual).
• SYMPTOM: The thermostat displays large setpoint digits instead of the room
temperature.
CAUSE: The thermostat has been programmed to display Single Setpoint.
REMEDY:ProgramthethermostattodisplayDualSetpoint(step #4, page 19 of
the Owner’s Manual).