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AG2
Series
Diagnostics
Lockout:
The controls will automatically lockout the heater system when an external or system fault occurs. There
are two types of lockout:
Soft Lockout: The heater will attempt to light three times. In the event of a failed attempt to light, (gas
pressure, valve, no flame sense etc.), the heater will enter a soft lockout period for 30
minutes and then attempt to light three more times before entering Hard Lockout mode.
Hard Lockout: If proof of flame is not established, a component failure occurs or blockages are evident,
the heater will enter hard lockout. If lockout occurs, the control can be reset by briefly
interrupting the power source. Refer to Chart 3.1 below for a description of LED codes.
Figure 3.1
•
LED Operation Indicator Lights
Note: Hard lockout LED CODE will appear upon completion of the soft lockout sequence of operation.
Chart 3.1 •
LED Fault Code Status
LED Code
Initial flash on power up,
then steady off
Steady ON
1 flash
2 or 3 flashes
4 flashes
No flash on 117V startup
*Some LED codes have a time delay before the LED will flash.
Light 3 (red)
Indicates Diagnostic
Fault Code Status
(see Chart 3.1)
Operational Indicator Lights
Fault Status
No fault, normal operation
Module failure / Internal fault
Ignition failure
APS (Air Proving Switch)
(Fan / Intake / Exhaust)
Solenoid valve fault
Leaky valve
Flame amplifier fault
Transformer fault
13
3.0
Operation • Diagnostics
Light 1(amber)
Light 2 (amber)
Indicates High
Indicates Low
Fire Mode
Fire Mode
Fault Code Delay*
No Delay
No Delay
30 – 32 minutes
10 – 12 minutes
No Delay
No Delay
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