Siemens Maxum II - Page 39

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
Oven Heater Power
fro
m PECM
Filament
Detector
Flame
Ionization
Detector
(FID)
Detector
Personality
Module
(DPM)
Heater Control from DP
M
FID
Heater Power from PECM
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 39