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7. Fault Finding – Page 24
BB45000A
TURN BOILER STANDBY
SWITCH TO ON
DOES LED INDICATOR
COME ON IMEDIATELY?
INVESTIGATE CAUSE OF LOCKOUT.
a. BLOCKED PILOT.
b. OVERHEAT.
c. INADEQUATE ROOM VENTILATION.
d. INADEQUATE FLUE DRAUGHT.
IS INDICATOR SHOWING
GREEN?
MOMENTARILY PRESS RESET
BUTTON
DOES THE LED EXTINGUISH?
AFTER APPX 15 SEC, ARE SPARKS
DISCHARGING AT IGNITION
ELECTRODE? (THE AIR INTAKE
DUCT MAY BE REMOVED TO
FACILITATE PILOT AND
ELECTRODE INSPECTION)
ISOLATE ELECTRICITY SUPPLY.
REMOVE INTAKE DUCT AND
VIEW PILOT BURNER.
IS PILOT FLAME ALIGHT?
REPLACE FSC BOARD
REPLACE GAS VALVE
ARE SPARKS DISCHARGING
ELSWHERE?
IS OVERHEAT 'STAT
CLOSED CIRCUIT?
IS THERE 230v ac BETWEEN
Sw1 and N ON THE MAINS
CONNECTION BLOCK?
FAULT EXTERNAL TO
APPLIANCE.
CHECK ELECTRODE GAP.
REPLACE & / OR RECONNECT
ELECTRODE LEAD AS NECESSARY.
CHECK OVERHEAT STAT LEADS AND
CONNECTIONS. REPLACE 'STAT IF
NECESSARY.
IS RESISTANCE OF TEMPERATURE
SENSOR BETWEEN 7K AND15K OHMS
AT ROOM TEMPERATURE?
WITH TEMPERATURE CONTROL
ON MAXIMUM, IS THER
MORE THAN 3v dc AND
LESS THAN 6v dc BETWEEN
CONECTOR TERMINALS PL6-8
AND PL6-9 ON THE FSC BOARD?
REPLACE FSC BOARD
REPLACE USER CONTROL BOARD
REPLACE THERMISTOR
DOES LED SHOW RED LIGHT
AFTER APPX 20 SEC?
IS LED SHOWING GREEN LIGHT?
IS THERE 230v ac BETWEEN
TERMINALS PL4-4 AND PL4-5
ON THE FSC BOARD?
REPLACE GAS VALVE.
REPLACE FSC BOARD.
BBU FAULTFINDER
PRELIMINARY ACTIONS
a. Set Standby Switch To Standby Position.
b. Turn On Gas And Electricity Supplies.
c. Arrange For System Controls To Be Calling For Heat.
START
NO
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
YES
YES
YES
YES
YES
NO
NO
Содержание Housewarmer 45
Страница 17: ...4 Installation Page 17 ...
Страница 25: ...8 Electrical Diagrams Page 25 ...
Страница 34: ...Installation Page 7 ...
Страница 35: ...Installation Page 8 ...