Carrier Performance 25HPA6 Installation Instructions Manual

Also see for 25HPA6: Wiring diagram

Contents

13Status CodesTable 4 shows the status codes flashed by the amber status light.Most system problems can be diagnosed by reading the status codeas flashed by the amber status light on the control board.The codes are flashed by a series of short and long flashes of thestatus light. The short flashes indicate the first digit in the statuscode, followed by long flashes indicating the second digit of theerror code.The short flash is 0.25 seconds ON and the long flash is 1.0 secondON. Time between flashes is 0.25 seconds. Time between shortflash and first long flash is 1.0 second. Time between coderepeating is 2.5 seconds with LED OFF.EXAMPLE:3 short flashes followed by 2 long flashes indicates a 32 code.Table 4 shows this to be low pressure switch open.Table 4 – TROUBLESHOOTINGOPERATION FAULTAMBER LEDFLASHCODEPOSSIBLE CAUSE AND ACTIONStandby – no call for unit operation None On solid, noflash Normal operationLow Stage Cool/Heat Operation None 1, pause Normal operationHigh Stage Cool/Heat Operation None 2, pause Normal operationSystem Commu-nications Failure16 Communication with User Interface lost. Check wiring to User Interface,indoor and outdoor unitsInvalid Model Plug 25 Control does not detect a model plug or detects an invalid model plug. Unitwill not operate without correct model plug.High PressureSwitch Open 31* High ---pressure switch trip. Check refrigerant charge, outdoor fan operationand coils for airflow restrictions.Low PressureSwitch or Dis-charge TempSwitch Open32* Low---pressure switch or discharge temperature switch trip. Check refrigerantcharge and indoor air flow.Control Fault 45 Outdoor unit control board has failed. Control board needs to be replaced.Brown Out (230 v) 46 Line voltage < 187v for at least 4 seconds. Compressor and fan operationnot allowed until voltage>190v. Verify line voltage.No 230v at Unit 47There is no 230v at the contactor when indoor unit is powered and cooling/heating demand exists. Verify the disconnect is closed and 230v wiring isconnected to the unit.Outdoor Air TempSensor Fault 53 Outdoor air sensor not reading or out of range. Ohm out sensor and checkwiring.Outdoor CoilSensor Fault 55 Coil sensor not reading or out of range. Ohm out sensor and check wiring.Thermistors out ofrange 56 Improper relationship between coil sensor and outdoor air sensor. Ohm outsensors and check wiring.Low StageThermal Cutout 71*Compressor operation detected then disappears while low stage demandexists. Possible causes are internal compressor overload trip or start relayand capacitor held in circuit too long (if installed).High StageThermal Cutout 72*Compressor operation detected then disappears while high stage demandexists. Possible causes are internal compressor overload trip or start relayand capacitor held in circuit too long (if installed).Contactor Shorted 73 Compressor voltage sensed when no demand for compressor operationexists. Contactor may be stuck closed or there is a wiring error.No 230V atCompressor 74 Compressor voltage not sensed when compressor should be starting. Con-tactor may be stuck open or there is a wiring error.Low StageThermal Lockout 81 Thermal cutout occurs in three consecutive low/high stage cycles. Lowstage locked out for 4 hours or until 24v power recycled.High StageThermal Lockout 82 Thermal cutout occurs in three consecutive high/low stage cycles. Highstage locked out for 4 hours or until 24v power recycled.Low---PressureLockout 83 Low pressure switch trip has occurred during 3 consecutive cycles. Unitoperation locked out for 4 hours or until 24v power recycled.High ---PressureLockout 84 High pressure switch trip has occurred during 3 consecutive cycles. Unitoperation locked out for 4 hours or until 24v power recycled.* Sequence: Compressor contactor is de--- energized and outdoor fan is energized for up to 15 minutes. If demand still exists, control will energize compressor contactor after 15 minutedelay. If fault is cleared, unit will resume operation. If fault still exists, fan shuts off, and error code continues to flash. Control will attempt re--- start every 15 minutes. Cycling low voltagedefeats the 15 minute delay.25HPA6

/ 16

Related manuals for Carrier 25HPA6