W415-1117 / A / 03.11.14
51
IOM
19.4 DIAGNOSTIC CODES FOR STATUS LED
19.5 FAULT CODE HISTORY
H23.4.1
STATUS
FAULT CONDITION
LED
Red LED 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
Lockout due to too many failed ignition attempts (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 3 colour LED is provided to indicate system faults. LED codes are as follows:
• LED Off - No power to control, push button switch pressed, or control fault
• LED Steady On (any colour) - Control hardware fault detected
• Slow Green Flash - No call for heat, no active errors
• Slow Orange Flash - Call for heat present, no active errors
• Rapid
fl
ash - Incorrect 24VAC phasing/twinning errors
H23.5
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.