Operating instructions

MMaaiinntteennaannccee,, TTrroouubblleesshhoooottiinngg && RReeppaaiirrss

FFaauulltt CCooddee FFaauulltt DDeessccrriippttiioonn CCaauusseess // RReeppaaiirr FFaauulltt SSiiggnnaall // FFllaasshhiinngg CCooddee

064 Open circuit - flame sensor Flame sensor signals temperature value outside

measurement range. Check the connecting leads (0.35

green). Impedance between terminals 10 and 12 of the

065 Short circuit - flame sensor control unit (internal plug): greater than 50 kohms (in the

event of interruption) less than 100 ohms (in the event

of short-circuit). Flame sensor values:

900 ohms at -25°C, 1100 ohms at +25°C.

071 Open circuit - overheat sensor Overheat sensor signals temperature value outside

measurement range. Check the connecting leads (0.35

072 Short circuit - overheat sensor blue). Impedance between terminals 5 and 8 of the

control unit (internal plug): greater than 700 kohms

(in the event of interruption) less than 100 ohms (in the

event of short-circuit). Overheat sensor values:

150 kohms at -25°C, 10 kohms at +25°C.

090 Control unit defect (internal fault) Internal control unit error in microprocessor/memory

detected. Replace control unit.

093 Control unit defective(RAM error)

094 Control unit defective(EPROM fault)

097 Control unit defective (power failure)

88 sseeccoonnddss