3
PFP7/REV C/01-08
SECTION 7 ................................................................................................... 25
Trouble shooting ....................................................................................................................25
7.1
General ......................................................................................................................25
7.2
Unstable results .........................................................................................................25
7.3
Unable to set standard reading..................................................................................25
7.4
Non-linear results.......................................................................................................26
7.5
Flame will not light .....................................................................................................26
7.6
No electrical power ....................................................................................................26
7.7
No reading on display ................................................................................................27
7.8
Unable to set blank ....................................................................................................27
SECTION 8 ................................................................................................... 28
Service Information ................................................................................................................28
8.1
Sample system description ........................................................................................28
8.2
Combustion and ignition system description .............................................................29
8.3
Optical system description .........................................................................................30
8.4
Power supply description ...........................................................................................30
8.5
Signal processing description ....................................................................................33
Component replacement .......................................................................................................35
9.1
Chimney and optical components..............................................................................35
9.2
Power supply PCB .....................................................................................................39
9.3
Main PCB replacement ..............................................................................................40
9.4
Fuel solenoid replacement.........................................................................................41
9.5
Fuel needle valve .......................................................................................................42
9.6
Spark generator replacement ....................................................................................42
9.7
Air regulator assembly replacement ..........................................................................43
SECTION 10 ................................................................................................. 44
Spare parts..............................................................................................................................44
10.1
Minor spares kit (500 172) .........................................................................................44
10.2
Major spares kit (500 173) .........................................................................................44