S9200U Diagnostic Codes

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.