25
E95.1901EN032 User manual Slant Fin VGH-CH / CO
Blocking codes
If you cannot restart your boiler with the reset button, contact your installer.
Maintenance and repairs must be carried out by a certified technician/installer.
Blocking
code
Error
Description
Cause
Solving
100
WD_ERROR_
RAM
Internal software error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
101
WD_ERROR_
ROM
Internal software error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
102
WD_ERROR_
STACK
Internal software error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
103
WD_ERROR_
REGISTER
Internal software error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
104
WD_ERROR_
XRL
Internal software error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
105
HIGH_TEMP_
ERROR
T_Supply sensor measures
over Stay_Burning_Temp
for a period of
Max_Value_Period.
not enough
waterflow over heat
exchanger
If the boiler does not start
after Reset, contact your
installer
106
REFHI_TOO_
HIGH
Internal hardware error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
107
REFHI_TOO_
LOW
Internal hardware error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
108
REFLO_TOO_
HIGH
Internal hardware error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
109
REFLO_TOO_
LOW
Internal hardware error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
110
REFHI2_TOO_
HIGH
Internal hardware error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
111
REFHI2_TOO_
LOW
Internal hardware error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
112
REFLO2_TOO_
HIGH
Internal hardware error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
113
REFLO2_TOO_
LOW
Internal hardware error
wrongly
programmed BCU
or PB
If the boiler does not start
after Reset, contact your
installer
114
FALSE_FLAME
Flame is detected in a state
in which no flame is allowed
to be seen
wrong earthing of
BCU and boiler
If the boiler does not start
after Reset, contact your
installer
116
LOW_WATER_
PRESSURE_
SENSOR
Low water pressure, occurs
when the pressure drops
below Minimal_Pressure, or
when the pressure drops
below 4.5 psi .
not enough water
pressure
fill up the system and
check if there are any
water leakages
WARNING
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