Carrier Debonair 33CS Installation And Operating Instructions Manual

Also see for 33CSSP2-WC: Owner's manual

Contents

troubleshooting

Carrier Debonair 33CS Installation And Operating Instructions Manual Manual pdf 7 page image

TROUBLESHOOTINGTable 4 — TroubleshootingPROBLEM SOLUTIONDisplay on thermostat not illuminated. Check for 24 vac at the R terminal connection. TerminalR must be connected for proper thermostat operation.Cooling will not energize. Select COOL mode. Decrease cooling set point to10 degrees below room temperature. Check for 24 vacat Y1 terminal. If present, thermostat is operating cor-rectly and problem is with wiring or equipment. If 24 vacis not present, replace the thermostat. Check for Com-pressor Cycle per Hour Limit. Cooling may be lockedout.Heating will not energize. Select HEAT mode. Increase heating set point to 10 de-grees above room temperature. Check for 24 vac at W1/O/B terminal. If present, thermostat is operating correctlyand problem is with wiring or equipment. If 24 vac is notpresent, replace the thermostat.When using 4 wires (R,G,W,Y), the coolingequipment tries repeatedly to turn on, but can-not. At times the display dims or disappears.There is not enough power available. Connect a270 ohm, 10 watt power resistor at the air conditioningequipment between terminals W and C (non-heat pumpapplications only).When using 4 wires (R,G,W,Y), the heatingequipment tries repeatedly to turn on, but can-not. At times the display dims or disappears.There is not enough power available. Connect a270 ohm, 10 watt power resistor at the air-conditioningequipment between terminals Y and C (non-heat pumpapplications only).When controlling a heat pump, heat comes onduring cooling cycle.Configure thermostat for heat pump operation (Table 2,Step 5).When calling for cooling, both heating andcooling are energized.The thermostat is configured for a heat pump. Configurethe thermostat for non-heat pump operation (Table 2,Step 5).When controlling a commercial heat pumpunit, unit runs in reverse or heating is alwayson.Some commercial heat pumps require that Heat PumpOption on thermostat is turned OFF. Refer to unit instal-lation instructions for more information.7

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