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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
370
Critical
Furnace
Interlock Switch
Open
(Float Switch)
Communicating Mode:
In communicating mode, the DS-R terminal can be used with the SLP99V, EL296 and the SL280 furnaces will be used to
monitor a field-installed interlock switch such as a float switch. When operating in this capacity, the DS jumper will be monitored
as follows:
NOTE:
The on-board jumper
DS-R (W914)
will be cut.
• When no alert codes are present there will be 24VAC present at this terminal.
•
When controls see the loss of 24VAC for two minutes it will send an alert code 370 and disable all service bits.
• If currently running a demand, de-energize all outputs (including the blower).
• The alert code will clear when 24VAC is continuously sensed on
DS
terminal for a minimum of 10 seconds and the respective
alert code clearing message will be sent and service bits restored.
•
In case of an existing interlock switch alert code, upon power reset, an alert code message shall be sent if voltage is not
sensed on the
DS
terminal. An alert code clearing message will be sent if 24VAC is sensed on
DS
terminal for the minimum
of 10 seconds.
• The monitoring of
DS
terminal will apply to both variable speed and constant torque controls.
Non-Communicating Mode:
The furnace control has not received 24VAC power for two minutes or more on the DS terminal
• The system will not operate.
• Dealer has cut the
W914
jumper (Dehum, Harmony III) on the Lennox furnace control.
• The thermostat monitors the
DS
terminal in the furnace for power and if the link has been cut then power will be lost to
DS
.
• If DS to R terminal is accidentally cut you must reconnect a jumper from the DS to R on the terminals strip.
This alert code will clear when 24VAC is continuously sensed on
DS
terminal for a minimum of 10 seconds or on a power reset.
371
Moderate /
Critical
Air handler
Float Switch
Sensed Open
After being active for 10 minutes (600 seconds) the priority condition will change to Critical. Automatically clears after fault
recovered.
380
Moderate /
Critical
Equipment
interface
module
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
Equipment
interface
module
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 to priority condition critical.
Automatically clears 30 seconds after fault clears.
