Lennox CBX40UHV Error Codes
Air handler · Split & Multi-Split
- - Push and hold button until required symbol displays: H, A or P.
- . Idle mode (decimal point / no unit operation)
- A Delivered CFM. Example: A1200
- C Stage cooling (shows active cooling stages) C1 or C2
- E To enter Error Code Recall Mode - PUSH and HOLD button until solid E appears, then…
- E000 No stored error codes in memory. In recall mode, control displays up to ten stored codes;…
- E105 Equipment is unable to communicate. Indicates numerous message errors. In most cases…
- E114 Possible issue with main power frequency (control requires 60 Hertz power).
- E115 Low 24 volts (18 or less volts) - Control will restart if the error recovers.
- E120 Usually caused by delay in outdoor unit responding to indoor unit.
- E124 Active Subnet Controller Missing for > 180 seconds. This indicates a data connection has…
- E130 Configuration jumper(s) is missing on AHC.
- E131 Non-volatile data corruption.
- E132 Recycle power. If failure re-occurs, replace AHC. System reset is required to recover.
- E180 Outdoor air temperature sensor (OAS) out of range.
- E201 Indoor Blower communication failure - (includes indoor blower power outage)
- E202 Incorrect air handler model size and capacity selected or wrong motor. Check for proper…
- E203 No air handler model size and capacity selected. Check for proper configuring under…
- E292 Indoor blower motor unable to start (seized bearing, stuck wheel, etc.).
- E295 Indoor blower motor over temperature (motor trip on internal protector)
- E310 Discharge air sensor (DATS) out of range, open or shorted. Code is only active in…
- E312 Restricted airflow - Indoor blower motor is running at a reduced CFM (cutback mode **)
- E313 Indoor and outdoor unit capacity mismatch.
- E331 Global network connection error. This usually indicates there is a short or overladed…
- E345 Second-stage cooling link not cut. AHC Y1-Y2 link not cut for non-communicating heat pump.
- E346 Heat pump link not cut. AHC R-O link not cut for noncommunicating heat pump. Only on AHC…
- E347 Relay Y1 failure. AHC relay activated, but not respond back .
- E348 Relay Y2 failure. AHC relay activated, but not respond back .
- E350 Heat call with non-configured or mis-configured electric heat. Check for proper…
- E351 Heat section / Stage 1 failed (Pilot relay contacts did not close or the relay coil in…
- E352 Heat section / Stage 2 failed.
- E353 Heat section / Stage 3 failed.
- E354 Heat section / Stage 4 failed.
- E355 Heat section / Stage 5 failed.
- E401 Compressor ran more than 18 hours in air conditioning mode.
- E402 Compressor system pressure trip.
- E403 Compressor short-cycling - running less than four minutes.
- E404 Compressor rotor locked.
- E405 Compressor open circuit.
- E406 Compressor open start circuit.
- E407 Compressor open run circuit.
- E408 Compressor contactor is welded.
- E409 Compressor low voltage.
- E420 When in icomfort mode with non-communicating HP, defrost cycle running greater than 20…
- H Release push button - control will cycle the indoor blower motor on to the selected heat…
- P 1. When the correct Unit Sized Code is displayed, RELEASE push button. Selected code will…
- U Discharge air sensor temperature (indoor blower must be operating) U105
- c Push button to confirm command to delete codes. Error codes are cleared.
- d Dehumidification mode (unit in dehumidification mode only)
- d F Shown only while in active defrost (Y, W and O call)
- h Stage heat pump (shows active heat pump stages) h1 or h2
- ≡ If three horizontal bars are displayed, AHC does not recognize air handler model size and…
Reference only. Confirm against the manual for your exact model. Data release 105f66ecb9e96e5dc473025d.