To Next PageTo Next PageWhat does Fault F020 mean on my Carrier 50FF Air Conditioner?
Fault F020 on your Carrier Air Conditioner indicates a software error, meaning the software on the MBB is not responding. Recovery is automatic if the software can reset the board. If not, try cycling the power to the control before considering board replacement.
What does Alert A019 mean on my Carrier 50FF Air Conditioner?
Alert A019 on your Carrier Air Conditioner indicates an MBB clock failure, meaning the RTC clock chip on the MBB is not responding. Automatic recovery is possible, but MBB board replacement might be necessary. Before replacing the board, try cycling power to the control and reconfiguring the time and date.
How to troubleshoot a Carrier Heat Pump that does not switch on?
If your Carrier Heat Pump unit doesn't switch on and the power LED on the main board is off, check the following: 1. Ensure the unit is receiving main power. 2. Verify the transformer output voltage is 24 Vac/Vdc. 3. Confirm the power supply connector at 24 Vac/Vdc is correctly inserted. 4. Inspect the overload fuse to ensure it is intact.
What does Alert A017 mean on my Carrier Air Conditioner?
Alert A017 on your Carrier Air Conditioner indicates that the MBB 5VDC voltage is out of range, typically caused by an MBB failure or the supply voltage being out of range. When this alert is active, transducer inputs will be in error. The alert should automatically clear when the voltage rises above 4.5 volts DC.
What does Alert A016 mean on my Carrier 50FF?
Alert A016 on your Carrier Air Conditioner indicates that the MBB 24VDC voltage is out of range, usually due to an MBB failure or the supply voltage being out of range. When this alert is active, Analog Input numbers 6, 7, and 8 will be in error. The alert should automatically clear when the voltage rises above 19 volts DC.
What does Alert A015 mean on my Carrier Air Conditioner?
Alert A015 on your Carrier Air Conditioner indicates that the MBB RNET voltage is out of range, generally due to an MBB failure or the supply voltage being out of range. The alert should automatically clear when the voltage returns to its normal range.
What does Fault F014 mean on my Carrier Air Conditioner?
Fault F014 on your Carrier Air Conditioner means that MBB Fuse 3 is open. This is usually caused by a wiring error in a switch input or the switch drawing too much current. The control system will shut down the unit, and the fault should clear automatically once the fuse temperature is back in the normal range.
What does Fault F013 mean on my Carrier Air Conditioner?
Fault F013 on your Carrier Air Conditioner indicates that MBB Fuse 2 is open, typically due to a wiring error in a switch input or the switch pulling too much current. The control will shut down the unit, but the fault should automatically clear when the fuse temperature returns to normal.
What does Alert A012 mean on my Carrier Air Conditioner?
Alert A012 on your Carrier Air Conditioner signals an MBB zero crossing issue, often caused by an MBB failure or the supply voltage frequency being too high or too low. The alert should automatically clear once the supply voltage returns to the normal range.
What does Fault F011 mean on my Carrier Air Conditioner?
Fault F011 indicates that the MBB reference voltage is out of range, usually due to an MBB failure or the supply voltage being out of range. The control system will shut down the unit. This fault should automatically clear when the DC reference voltage returns to its normal range.
General| Series | 50FF |
|---|---|
| Refrigerant | R-410A |
| Product Type | Air Conditioner |
| Cooling Capacity | 1.5 to 5 Tons |
| Operating Voltage | 208/230V |
| Dimensions (H x W x D) | Varies by model |
| Weight | Varies by model |
