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S9V2-SF-2A-EN
Troubleshooting
The following pages include troubleshoong flowcharts in reference for the 2 Stage S9V2* family of furnaces only.
The informaon contained is for reference only and does not cover all scenarios or problems that may be encountered.
ONLY qualified technicians should aempt to install, troubleshoot, or repair this appliance.
Failure to follow all cauons and /or warnings could result in personal or property damage, including death.
Error Codes
Alarm Error Code
Alarm Explanation
e0!
Loss of the IRQ or other internal failures (Internal IFC error)
e2.!
Retry Exceeded (Failed to Establish Flame)
e2.2
Recycles exceeded (Loss of Established Flame) or 10X PS1 Open
e2.3
1st Stage Gas Valve Not Energized When It Should Be exceeded after 10 times
e2.4
Redundant Relay (HLO output) Not Energized when it should be exceeded after 10 times
e3.!
Shorted Pressure Switch, 1st Stage
e3.2
Open Pressure Switch, 1st Stage
e3.3
Shorted Pressure Switch, 2nd Stage
e3.4
Open Pressure Switch, 2nd Stage
e04
Open Limit (Main Thermal, Rollout Switch, or Reverse Airflow Switch)
e0s
Flame detected, should not be present
e06
Voltage reversed polarity or Bad Grounding
e6.3
(1) Igniter relay fails
(2) Igniter open
e7.!
1st stage gas valve (MVL) is energized when it should be off
e7.2
Redundant Relay (HLO output) Energized when it should Not be
e08
Flame current is low, but still strong enough to allow operation
e0g
Open Inducer Limit Switch or Condensate Pressure Switch
e10
Communication error between variable speed inducer and blower motor microprocessor
e!!
(1) 2nd stage gas valve energized when it should NOT be
(2) 2nd stage gas valve not energized when it should be
(3) 1st stage gas valve not energized when it should be
(4) Redundant relay (HLO output) not energized when it should be
e!2
Open fuse
e!3
Blower HP/OEM ID
e!4
No PM and local copy bad
e!s
Both of unit Data File in PM and local Unit Data File are corrupt
e!7
Blower motor no communication response
e!8
Blower communication failure on the control
