6. Open the electronics enclosure door, mezzanine door, and oven door. Use a 4mm Allen
wrench if necessary and be careful not to place tension on the ribbon cable connecting to
the Maintenance Panel.
FID Output Signal
FID Bias (300V)
Igniter Signal
FID RTD
Leads
O
ven
H
ea
te
r Po
wer
fro
m
PE
CM
Filament
Detector
Flame
Ionization
Detector
(FID)
Detector
Personality
Module
(DPM)
Hea
ter C
ontro
l fro
m D
PM
FI
D
He
at
er
P
ow
er
fr
om
P
EC
M
Figure 4-4
Typical FID Connections
7. Disconnect the FID heater power cable from the PECM. Note the connector location.
8. Disconnect the FID heater RTD cable from the DPM connector board. Note the connector
location.
Flame Ionization Detector
4.4 Replacing the FID Igniter
Maxum Edition II Detectors
Service Manual, May 2018, A5E42019847001
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