Service engineer, Guide to fault finding – Honeywell Central Heating Cooker Natural Gas User Manual

Page 36

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36

SERVICE ENGINEER

GUIDE TO FAULT FINDING

NO

CHECK OPERATION OF LIMIT

THERMOSTAT

AND NEON INDICATOR

NO

IS THERE 230V ON TERMINAL

OF MAINS INLET PLUG

IS THERE 230V ON TERMINAL L

OF COOKER PROGRAMMER

IS THERE 230V ON BLACK WIRE

(SWITCH LIVE) FROM

PROGRAMMER

IS THERE 230V ON BLACK WIRE

ON COOKER LIMIT STAT

IS THERE 230V ON DOUBLE BROWN

WIRE ON COOKER LIMIT STAT

CHECK PLUG CONNECTION

TO CONTROL BOXES

REFER TO BURNER FAULT

FINDING SECTION

CHECK 3 AMP

FUSE SUPPLY

CHECK PLUG

CONNECTIONS

CHECK OPERATION OF
COOKER THERMOSTAT

CHECK OPERATION OF

PROGRAMMER

(NOTE PROGRAMMER WILL

GO TO SLEEP IF LEFT WITH

POWER OFF FOR 14 DAYS)

COOKER NOT WORKING - SWITCH ON AT CLOCK + THERMOSTAT

YES

YES

YES

YES

NO

NO

NO

NO

NO

YES

YES

YES

IS THE COOKER BURNER LOCK

OUT LIGHT ILLUMINATED

IS BLOCKED FLUE LIGHT

ILLUMINATED

REFER TO FAULT FINDING

SECTION

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