Honeywell S9200U1000 Installation Instructions Manual page 20

S9200U1000 UNIVERSAL HOT SURFACE IGNITION INTEGRATED FURNACE CONTROL
Flash
Red LED Status Code and Error
a
Code Description
Pulse Control powered (Standby; No Call for
Heat)
Heartbeat Call for Heat - Normal operation
Pressure Switch Codes
2 Pressure Switch failed Open
3 Pressure Switch failed Closed
4 Pressure Switch opened during Trial For
Ignition or Run Mode
Limit Code
5 Limit switch open
Flame Code
6 Unexpected flame - Waiting for flame to be
off after the 20 second delay
Soft Lockout Codes
2 + 1 Soft Lockout - Exceed maximum number
of retries
2 + 3 Soft Lockout - Exceeded maximum
number of recycles or retries where the
last recycle/retry was due to the pressure
switch opening
2 + 4 Soft Lockout - Exceeded maximum
number of recycles where the last recycle
was due to a flame failure
2 + 5 Soft Lockout - Exceeded maximum
number of recycles where the last recycle
was due to the limit circuit opening or the
limit remained open longer than three
minutes
2 + 6 Soft Lockout - Gas Valve Failed to Make
Other Codes
3 + 1 Low 24V (Control restarts if the error
recovers)
3 + 2 Bad Fuse
3 + 4 Gas valve error - Miswire or welded
(Control restarts if the error recovers and it
has not been detected five times yet)
69-2075—01
Table 11. Control Status Codes (Red LED).
Not Applicable
Not Applicable (normal operation)
Check: If inducer is running, inducer could be broken or disconnected, or inducer relay
K4 may have failed.
Check/Repair: Low line voltage; Pressure switch wiring loose; hose disconnected or
leaking; water in hose; venting blocked or obstructed.
Check: If inducer is off; inducer relay (K4) could be welded.
Check/Repair: Terminal wiring (shorted); pressure switch contacts (closed when should
be open); pressure switch hoses have water build-up or obstruction.
Check: See if inducer is running.
Check/Repair: Restricted venting; low input voltage; water in horizontal vent length.
Check: Wiring; restricted airflow through heat exchanger; clogged filters; slow circulator
fan speed.
Repair: Remove restrictions. Increase airflow through furnace (increase motor speed,
open more ducts, add more returns).
Check/Repair: Gas valve leakage.
Check/Repair: Gas supply (pressure, supply, shut-off valves, gas valve); ignition (HSI
element not properly positioned and glowing); flame sensing (lead-wire broken or
grounded, flame rod not properly positioned, or flame rod contamination); low line
voltage.
Check/Repair: Pressure switch wiring; slow inducer; restricted, excessive, or obstructed
venting; unstable line voltage.
Check/Repair: Gas supply; flame sensor wiring.
Check: Wiring; restricted airflow through heat exchanger; clogged filters; slow circulator
fan speed.
Repair: Remove restrictions. Increase airflow through furnace (increase motor speed,
open more ducts, add more returns).
Check/Repair: Gas valve, Gas valve wiring.
Replace S9200U1000 if problem persists.
Check/Repair: Low voltage transformer and circuit.
Voltage should be nominally 24 Vac with 120 Vac on incoming line voltage. Verify low
voltage under all thermostat request modes to insure there are no issues with other low
voltage loads such as the outdoor unit 24 Vac contactor.
Check: Wiring (limit, rollout, pressure switch shorted to chassis; EnviraCOM™ bus);
gas valve could be shorted.
Turn off the power and replace the fuse with a fuse of the same type.
Cycle power to appliance and run heating sequence.
If this failure repeats, replace the control.
Check/Repair: Gas valve wiring.
Cycle power to appliance and run heating sequence.
If this failure repeats, replace the control.
Check / Repair
20