WarmFlow GS25A, Manual

Page: 55 / 66

MAINTENANCE INSTRUCTIONS
TR05A140.B1107 53
6.8 Troubleshooting
6.8.1 Error codes
IF BOILER FAILS TO FIRE
a.
NO GAS
b.
GAS INLET PRESSURE TOO HIGH
c.
MECHANICAL MINIMUM OR IGNITION SEQUENCE
GAS PRESSURES TOO LOW
d.
IGNITION ELECTRODE BROKEN OR EARTHED
e.
GAS VALVE MALFUNCTION
a.
CHECK MAINS SUPPLY
b.
CHECK INLET PRESSURE
c.
CHECK AND ADJUST MECHANICAL
MINIMUM AND IGNITION
SEQUENCE SETTINGS
d.
REPLACE PART
e.
REPLACE PART
E01
NO FLAME
(FLAME FAILURE
DURING START-
UP)
IF BOILER FIRES NORMALLY
f.
MAINS LIVE AND NEUTRAL WIRES REVERSED
g.
IONISATION ELECTRODE CABLE DISCONNECTED
h.
IONISATION ELECTRODE MALFUNCTION
f.
CORRECT MAINS WIRING
g.
CHECK ELECTRODE WIRING
h.
REPLACE PART
Table 10: Appliance error codes
CODE PROBLEM POSSIBLE CAUSE REMEDY
E02
SAFETY
THERMOSTAT
TRIPPED (95°C)
a.
THERMOSTAT CABLE DISCONNECTED
b.
THERMOSTAT MALFUNCTION
a.
CHECK THERMOSTAT WIRING
b.
REPLACE PART
E03
FLUE
THERMOFUSE
TRIPPED
a.
THERMOFUSE CABLE DISCONNECTED
b.
THERMOFUSE LOCK OUT (DUE TO HIGH FLUE
TEMPERATURE)
c.
THERMOFUSE MALFUNCTION
a.
CHECK THERMOSTAT WIRING
b.
REPLACE THERMOSFUSE,
RESTART AND CHECK APPLIANCE
c.
REPLACE PART
H20
LOW SYSTEM
PRESSURE
a.
WATER PRESSURE SWITCH CABLE DISCONNECTED
b.
INSUFFICIENT WATER PRESSURE IN THE SYSTEM
c.
WATER PRESSURE SWITCH MALFUNCTION
a.
CHECK SWITCH WIRING
b.
FILL OR TOP UP THE SYSTEM
c.
REPLACE PART
E05
HEATING
SENSOR FAULT
a.
SENSOR CABLE DISCONNECTED OR WET
b.
SENSOR MALFUNCTION OR OUT OF CALIBRATION
(RESISTANCE VALUE 10 kOhms AT 25 °C).
a.
CHECK SENSOR WIRING
b.
CHECK SENSOR RESISTANCE.
REPLACE IF INCORRECT
E16
FAN FAULT a.
BURNT FAN
a.
REPLACE PART
E22
PARAMETER
PROGRAMMING
REQUEST
a.
LOSS OF MICROPROCESSOR MEMORY
a.
REPROGRAM PARAMETERS
E35
IONISATION
ELECTORDE
FAULT
a.
IONISATION ELECTRODE WET, DAMP OR EARTHED
b.
IONISATION ELECTRODE MALFUNCTION
c.
IONISATION ELECTRODE CABLE MALFUNCTION
d.
MODULATION PCB MALFUNCTION
a.
CHECK COMBUSTION CHAMBER
b.
CLEAN PART (REPLACE IF FAULT
REMAINS AFTER CLEANING)
c.
REPLACE PART
d.
REPLACE PART
E42
FAN PCB FAULT
a.
FAN PCB TO MOD. PCB WIRING MALFUNCTION
b.
FAN PCB MALFUNCTION
a.
REPLACE PART
b.
REPLACE PART