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Form #43343330
May 08 –49–
IGNITION MODULE DIAGNOSTICS
Flame Fault
If at any time the main valve fails to close completely and maintains a flame, the full time flame sense circuit will
detect it and energize the combustion blower. Should the main valve later close completely removing the flame
signal, the combustion blower will power off following the post purge period.
Fault Conditions
The LED located on the ignition module will flash ON
for ¼ second, then OFF for ¼ second during a fault
condition. The pause between fault codes is 3
seconds.
24.0) INSTALLATION DATA
Date of Installation: # of Heaters in System:
Serial No.
Model: PTS or PTU
N = Natural Gas
L = Propane Gas
Error Mode LED Indication
Internal Control Failure Steady On
Air Flow Fault 1 Flash
Gas valve failure (stuck open) 2 Flashes
Ignition Lockout 3 Flashes
MULTIPURPOSE METER
USE
MICROAMP
SCALE
BLACK (-)
RED (+)
LED Display
GND
V2
FC-
FC+
V1
(W)TH
Ignition Module (Fenwal)
Flame Sensor Current Check
(R) 24VAC
L1
IND
NC
P.SW
S1