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Table 16. Alert Codes and Troubleshooting
Initial notification of critical alerts will pop up on the home screen and will be listed under notification menu. Minor and moderate alerts are found only under the
notification menu.
Alert
Code
Priority
Condition
Applicable
System
Component(s)
Actual Displayed
Alert Text
Component or System Operational State and Troubleshooting Tip
How to clear alert
code
380
Moderate /
Critical
Smart Hub
Interlock Relay
Failure
Interlock relay failure (furnace or air handler modes only).
Interlock relay is energized, but input is not sensed after three seconds.
There will be no heating or cooling due to this alert code – moderate
condition.
De-energize interlock relay and energize after five minutes if demand is
still present – critical condition.
Automatically clears
after fault recovered.
381
Moderate /
Critical
Smart Hub
Interlock Relay
Stuck
Interlock relay stuck (furnace or air handler modes only).
Interlock relay continuously sensed (with relay off).
There is no heating and cooling operation – moderation condition.
After 10 minutes if event still exist it will be escalated – critical condition.
Automatically clears
30 seconds after fault
clears.
382
Moderate
Smart Hub
Relay W1 Failure
Relay
W1
failure (furnace or air handler modes only). W1 relay is
energized but input is not sensed after three seconds.
Automatically clears
when W1 relay input is
sensed.
418
Moderate
Smart Hub
W Output Hardware
Fault
There is a faulty
W
output circuit.
W terminal is energized while in cooling mode.
Possible cause may be a stuck closed relay on the control, or something
external to the control that is energizing W terminal when it should not be
energized.
Disconnect any wiring from the W terminal.
If 24VAC is still present on the terminal, then it is a stuck relay.
If 24VAC disappears, then there is a need to check any of the wires
hooked up to the W terminal.
Automatically clears
after fault signal is
removed.
419
Critical
Smart Hub
W Output hardware
Fault Lockout
The
W
output has reported more than five errors.
The system will shut down the outdoor unit.
The W output (code E418) on the outdoor unit has reported more than five
strikes.
Disconnect thermostat wire from W and verify there is no 24VAC on the W.
If 24VAC is present, replace the outdoor control.
Automatically clears
after power recycled.
420
Critical
Smart Hub
Defrost Out of
Control
The heat pump defrost cycle has taken more than 20 minutes to complete.
Defrost cycle lasts longer than 20 minutes.
Check heat pump operation.
Automatically clears
when
W1
signal is
removed.
Summary of Contents for iComfort E30
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