Honeywell S9200U Integrated Furnace Control
Re: Diagnostic Codes
LED Indicators
The S9200U1000 has three LEDs:
- Flame – Amber LED: The Amber LED Indicates flame status such as weak or no flame.
- STATUS – Red LED: The Red LED indicates general system status, such as the presence of a call for heat and various error codes.
- E-COM – Green LED: This Green LED indicates EnviraCOM™ transmission is underway. The LED is directly linked to communication on the EnviraCOM™ bus.
- A typical transmitted message appears as a rapid flashing of the green LED. — A typical received message appears as single blink, indicating the S9200U1000 has acknowledged the message.
- NOTE: The E-COM LED is active even if a conventional thermostat is controlling the appliance.
Flash Code Descriptions
The LEDs flash codes at various intervals. Each pulse type indicates a specific functionality/ message type.
- Periodic Blink (Normal): 0.5 second on, 0.5 second off.
- Pulse: A 0.25 second flash followed by 3.75 seconds of off time.
- Heartbeat: Constant 0.5 second bright, 0.5 second dim cycles.
- Standard LED Fault Pattern (Single X Flash): LED flashes X times at 2HZ, then off for 3 seconds.
- Advanced LED Fault Pattern (X + Y Flash): LED flashes X times at 2Hz, remains off for one second, flashes Y times at 2Hz, remains off for three seconds, and then repeats.
Amber LED Status
- OFF = No flame
- Heartbeat = Call for heat - Flame present
- Periodic Blink = Call for heat - Low flame signal
Red LED Status
- Pulse = Standby; No call for heat
- Heartbeat = Call for heat - Normal operation
- Code 2 = Pressure switch failed "Open"
- Code 3 = Pressure switch failed "Closed"
- Code 4 = Pressure switch opened during trial for ignition or during Run Mode
- Code 5 = Limit switch open
- Code 6 = Unexpected flame (flame sensed with gas valve off)
- Code 2 + 1 = Soft Lockout - Exceeded maximum number of retries
- Code 2 + 3 = Soft Lockout - Exceeded maximum number of retries - pressure switch
- Code 2 + 4 = Soft Lockout - Exceeded maximum number of retries - flame sensor
- Code 2 + 5 = Soft Lockout - Exceeded maximum number of retries - limit switch
- Code 2 + 6 = Soft Lockout - Gas valve failed to make
- Code 3 + 1 = Low 24V power
- Code 3 + 2 = Blown low voltage fuse
- Code 3 + 4 = Gas valve error
- Code 3 + 5 = Control failed self-check
- Code 3 + 6 = Reversed line voltage polarity or Poor ground
- Code 4 + 1 = Hard Lockout - Rollout switch open
- Code 4 + 2 = Hard Lockout - Gas valve welded relay detected 5 times
- A Soft Lockout is reset by any on of the following ways: 1) Cycling Power 2) Thermostat Reset or 3) Auto Reset (time delay)
- A Hard Lockout can only be reset by Cycling Power.