The 50M56X-843 needs system components to be operational to configure the correct OEM connectors. If one of these components is not functioning correctly, the control will show an E41 error.
Use the steps below to ensure these key components are in the correct state.
- Review the warnings on the first page of the installation instructions. This procedure should only be done by a qualified HVAC contractor or technician.
- Disconnect electric power.
- Ensure included universal replacement ignitor is installed. Ignitor resistance when disconnected should be less than 100 ohms.
- Use multimeter on ohms or continuity to confirm all limit switches and roll-out switches are closed. You need to check them all individually, they may not be in a single continuous circuit on this control.
- If switches are closed, proceed to step 5
- If any switches are open, reset or replace safety switches that are open, apply power to unit and allow auto-configuration. If E41 persists, remove power and proceed to step 5
- Check inducer and pressure switch per the following steps:
- Disconnect wires from the inducer pressure switch.
- Set multimeter to ohms or continuity, connect probes to pressure switch tabs. Keep them connected for the rest of the test.
- If pressure switch is closed (<10 ohms), the pressure switch is causing the E41 error.
- Apply power to the system (control will displays dCF indicating automatic configuration is in process)
- Inducer should turn on during start up configuration.
- If inducer does not turn on before showing E41, this is the cause of the E41 Error. Verify inducer operates if powered directly.
- Confirm pressure switch closes with multimeter after inducer turns on.
- If pressure switch does not close when inducer turns on, the pressure switch is causing the E41 error.
- When auto-configure completes, the control will show E41. This is ok during this test.
- Remove multimeter from pressure switch and re-connect pressure switch to system wiring.
- Apply power to unit and allow auto-configuration procedure.
Other items to check:
- Verify system wiring diagram matches the examples in the instructions.
- Confirm all wiring connections completed and secure prior to power up
- Verify Line (120V) and low voltage (24V XFMR) is in range and the on-board fuse is not open (E06)
Contact our Technical Service Team for additional assistance.
Phone: +1 800 284 2925
wr.techsupport@copeland.com