Carrier INFINITY 24ANA Installation Instructions Manual

Also see for 24ANA1 Infinity: Product data Wiring diagram

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Carrier INFINITY 24ANA Installation Instructions Manual Manual pdf 13 page image

13Status CodesTable 6 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 flashis 1.0 second ON. Time between flashes is 0.25 seconds. Timebetween short flash and first long flash is 1.0 second. Timebetween code repeating is 2.5 seconds with LED OFF.Count the number of short and long flashes to determine theappropriate flash code. Table 6 gives possible causes and actionsrelated to each error.EXAMPLE:3 short flashes followed by 2 long flashes indicates a 32 code.Table 6 shows this to be low pressure switch open.Table 6 – TROUBLESHOOTINGOPERATION FAULTAMBERLEDFLASHCODEPOSSIBLE 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 Open 32* Low pressure switch trip. Check refrigerant charge and indoor air flowControl 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 Coil Sen-sor 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---stage Ther-mal 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 ---stage Ther-mal 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 at Com-pressor(24ANA1 Only)74 Compressor voltage not sensed when compressor should be starting. Con-tactor may be stuck open or there is a wiring error.low---stage Did NotStart(24ANA7 Only)75 Specified start voltage at VR terminal was not achieved in low---stage. Startrelay was de ---energized after 1 second.low---stage Did NotStart 3 times(24ANA7Only)76For 3 consecutive low---stage starts, the specified start voltage at VR terminalwas not achieved & start relay was de ---energized. low---stage locked out for30 minutes.high ---stage DidNot Start(24ANA7 Only)77 Specified start voltage at VS terminal was not achieved in high ---stage. Startrelay was de ---energized after 1 second.high ---stage DidNot Start 3 times(24ANA7 Only)78For 3 consecutive high ---stage starts, the specified start voltage at VS termi-nal was not achieved & start relay was de ---energized. high ---stage lockedout for 30 minutes.low---stage Ther-mal Lockout 81 Thermal cutout occurs in three consecutive low/ high ---stage cycles. low---stage locked out for 4 hours or until 24v power recycled.high ---stage Ther-mal Lockout 82 Thermal cutout occurs in three consecutive high/low---stage cycles. high ---stage 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.Low ContactorOpen(24ANA7 Only)85 Compressor voltage not sensed when compressor should be starting. low---stage contactor may be stuck open or there is a wiring error.High ContactorOpen(24ANA7 Only)87 Compressor voltage not sensed when compressor should be starting. high ---stage contactor may be stuck open or there is a wiring error.* Sequence: Compressor contactor is de ---energized and outdoor fan is energized for up to 15 minutes. If demand still exists, control will energize compressorcontactor after 15 minute delay. If fault is cleared, unit will resume operation. If fault still exists, fan shuts off, and error code continues to flash. Control willattempt re ---start every 15 minutes. Cycling low voltage defeats the 15 minute delay.24ANA

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