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Upper Element Connect Fault (Upper heating element circuit is open):
Loose connection or damaged wire-
• Turn off power at the circuit breaker / fuse box and check for a loose connection at the element. For
access directions see “Heating Element Replacement” (p.24).
Upper element faulty-
• Check resistance of the element itself to see if it’s around 12.4 Ω. If it is broken, replace non-
functioning element. See “Heating Element Replacement” (p.24).
Control board faulty-
• If the error persist, the problem may be caused by the control. Replace the control board.
• If replacing the control board doesn’t resolve the issue, contact technical support.
Lower Element Connect Fault (lower heating element circuit is open):
Loose connection or damaged wire-
• Turn off power at the circuit breaker / fuse box and check for a loose connection at the element. For
access directions see “Heating Element Replacement” (p.24).
Lower element faulty-
• Check resistance of the element itself to see if it is around 28 Ω. If it is broken , replace non-
functioning element. See “Heating Element Replacement” (p.24).
Important: Using an element greater than 2000 watts in place of the lower element will damage the
water heater and void the warranty.
Control board faulty-
• If the error still persists, this problem may be caused by the control board. Replace the control board.
Heat Pump Connect Fault (Heat pump compressor circuit is open):
Loose connection or damaged wire-
• Turn off power at the circuit breaker / fuse box.
• Check wire harness connections at compressor, control board, run capacitor and compressor relay.
• Inspect wires for damage.
Compressor thermal protector open-
• Compressor will restart after coolling off.
Faulty run capacitor-
• Check the capacitor, see “Checking the Run Capacitor” (p.26), replace if defective.
Control board faulty-
• Replace control board.
• If replacing the control board doesn’t resolve the issue, contact technical support.
Compressor faulty-
• Check the compressor, refer to the “Checking the compressor” fl owchart p.28, replace if defective.
Fan Connect Fault (Heat pump fan circuit is open):
Loose connection or damaged wire-
• Turn off power at the circuit breaker / fuse box
• Check that connector CN207 on control board is seated.
• Check wires for damage
The internal protector of fan motor may be open or the fan motor is broken-
• Check the fan motor, refer to “Checking the fan motor” fl owcharts (p.30-31). Replace if defective.
Control board faulty-
• Replace control board.
• If replacing the control board doesn’t resolve the issue, contact technical support.
Fault Code Troubleshooting Guide