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Fault Finding; Fault Finding Chart Main Menu - Zanussi ULTRA+ COMBI 30 Installation And Servicing

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4.1 FAULT FINDING CHART MAIN MENU

'F2 or Fn or Ln'
'L4 or F4'
'L5 or F5'
'F9 or L9 or F8 or L8'
NO CH BUT HW OK
NO HW BUT CH OK
NO DISPLAY
RESTART PROCEDURE: to restart boiler press the restart button.
Installation and Servicing
SECTION 4 - FAULT FINDING
'L1'
'L2'
'LC'
'L6'
'F1'
'F3'
'F6'
'F7'
'FA'
'FU'
'dU'
GO TO SECTION 4.2 -
FLOW TEMPERATURE OVERHEAT LOCKOUT
GO TO SECTION 4.3 -
IGNITION LOCKOUT
5 RESETS WITHIN 15 MINS -
TURN POWER OFF AND ON
GO TO SECTION 4.4 -
FALSE FLAME LOCKOUT
GO TO SECTION 4.5 -
LOW WATER PRESSURE
GO TO SECTION 4.6 -
FLAME LOSS
GO TO SECTION 4.7 -
FAN FAULT
GO TO SECTION 4.8 -
FLOW THERMISTOR FAULT
GO TO SECTION 4.9
RETURN THERMISTOR FAULT
GO TO SECTION 4.10
OUTSIDE SENSOR FAULT
LOW MAINS VOLTAGE -
CONTACT ELECTRICITY PROVIDER
PCB UNCONFIGURED OR FAULTY
SEE SECTION 3.19
IF FAULT PERSISTS REPLACE PCB
NEGATIVE DIFFERENTIAL
FLOW OR RETURN THERMISTOR FAULT
DIFF GREATER THAN 50°C
CHECK ISOLATION VALVES ARE OPEN
CHECK PUMP
CHECK RAD VALVES OPEN
CHECK SYSTEM BLOCKAGES
DIVERTER VALVE IN MID-POSITION FOR SERVICE
ROTATE KNOBS FULLY CLOCKWISE
TURN POWER OFF AND ON
RESTART BOILER
GO TO SECTION 4.11
GO TO SECTION 4.12
GO TO SECTION 4.13
55

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