78
Table 19. 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. Moderate alerts
are not e-mailed to Homeowners. Dealers will get an email and code can be seen on thermostat under the installer notification section.
NOTE:
Anytime the word
DEVICE
or
DEVICE2
is used in this table, it will be replaced on all alert code notification screens with the actual offending device name, for example, thermostat, heat
pump, etc.).
Alert
Code
Inverter
Flash
Code
Priority
Condition
Applicable
Component
Actual Displayed
Alert Text
Component or System Operational State and Troubleshooting Tip
417
Moderate
/ Critical
Outdoor unit Discharge Sensor
Faulty
System Detection and Operation:
The outdoor unit
discharge line
temperature sensor is either open, short-circuited or the temperature is out of sensor range.
• This fault is detected by allowing the unit to run for 90 seconds before checking discharge line sensor resistance.
• If the discharge sensor resistance is not within range after 90 second period, the control will display the priority condition as
moderate
.
• If the moderate condition continues for 10 minutes, the system changes the priority condition to
critical
.
Possible Causes:
• The applicable system component detects either an open, shorted or temperature out of range condition.
• Discharge sensor leads located in wrong pin positions in harness plug-in connector. Refer to the applicable unit installation
and service procedure and locate the terminal descriptions table to verify cable harness assembly wiring pin positions are
correct.
Possible Solutions:
• Check the resistance of the discharge sensor and compare to temperature resistance chart located in the applicable unit
installation and service procedure. If sensor resistance is out of range then replace the discharge line temperature sensor.
• If discharge sensor wring leads are located in the wrong connector pin-out then order a replacement cable assembly.
• Moderate
- Automatically clears after fault signal condition is no longer present.
• Critical
- Power down the system component and either replace faulty sensor or cable assembly (whichever is applicable).
Power up system component after replacing the applicable part which will clear the alert code / priority condition.
418
Moderate
Equipment
interface
module and
outdoor unit
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
Equipment
interface
module and
outdoor unit
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 (alert code 418) 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.
