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52
19.4 DIAGNOSTIC CODES FOR STATUS LED
IOM
IOM
19.5 FAULT CODE HISTORY
The control stores the last 5 fault codes in memory. When the push button switch is pressed, the
control will fl ash the stored fault codes when the switch is released. The most recent fault code is
fl ashed fi rst, the oldest last.
Fault history may be cleared by holding the push button switch for more than 5 seconds.
W415-2159 / D / 11.24.17
STATUS
LED
Red LED (AN1) indicates following codes:
LED OFF
No power to control or control hardware fault detected
LED ON
Normal operation
1 Flash
High limit switch open
2 Flashes
Pressure switch open with inducer on
3 Flashes
Pressure switch closed with inducer off
4 Flashes
Control in 1 hour lockout
5 Flashes
L1/Neutral Polarity problem
6 Flashes
Too many limit trips within one call for heat
7 Flashes
Pressure switch cycle lockout
8 Flashes
Lockout due to too many fl ame dropouts
9 Flashes
Not used
10 Flashes
Flame present with gas valve off
A green LED (AN2) is provided to indicate high heat state
LED OFF
No demand for high heat
LED ON
High heat demand, operating normally
LED Flashing High heat demand, high pressure switch not closed
FAULT CONDITION
H23.4.2B
H23.5
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