Carrier · Air conditioner

47 No 230 V at unit

High severity Carrier 2-stage 24ANB/25HNB

What the control is telling you

Amber STATUS light flashes 47: with the indoor unit powered and a demand present, no line voltage is seen at the contactor.

Applies to: Carrier 24ANB1/24ANB7 two-stage AC

Likely causes

Outdoor disconnect or breaker open
230 V wiring not connected
Blown fuses

Test and repair steps

Check the outdoor disconnect and breaker.
Measure 230 V at the line side of the contactor.
Verify field wiring is landed on the unit.

Models that show this code

8 models in Carrier 2-stage 24ANB/25HNB

24ANB12424ANB13624ANB14824ANB16024ANB72424ANB73624ANB74824ANB760

Other codes on the same units

25 Invalid model plug / inverter size
31 High pressure switch open
32 Low pressure trip
45 Outdoor control board failure
46 Brownout
53 Outdoor air temperature sensor fault
55 Outdoor coil temperature sensor fault
56 OAT / coil thermistor out of range

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Source: Carrier Residential AC & HP Application Guideline and Service Manual 24-25-9SM (text export), Table 18 Troubleshooting. Summarized in our own words; check the original manual for your model.

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For licensed technicians. Gas, electrical and refrigerant work must be done by a qualified, licensed person. Shut off power and gas before servicing, never bypass a safety control, and follow the manufacturer’s manual for the exact model; it and local codes always take priority. HVACopedia is not affiliated with any manufacturer; brand and model names only identify the equipment.