Blocking Codes - Slant/Fin VHG-100-CH Installation And Service Manual

Blocking codes

Block- Error
ing
code
100 WD_ERROR_
RAM
101 WD_ERROR_
ROM
102 WD_ERROR_
STACK
103 WD_ERROR_
REGISTER
104 WD_ERROR_ XRL
105 HIGH_TEMP_
ERROR
106 REFHI_TOO_
HIGH
107 REFHI_TOO_ LOW
108 REFLO_TOO_
HIGH
109 REFLO_TOO_
LOW
110 REFHI2_TOO_
HIGH
111 REFHI2_TOO_
LOW
112 REFLO2_TOO_HI
GH
113 REFLO2_TOO_LO
W
114 FALSE_FLAME
116 LOW_WATER_PR
ESSURE_
SENSOR
118 WD_COMM_
ERROR
119 RETURN_ OPEN
120 SUPPLY_ OPEN
122 DHW_OPEN
116
Description
Internal software error
Internal software error
Internal software error
Internal software error
Internal software error
T_Supply sensor
measures over
Stay_Burning_Temp
for a period of
Max_Value_Period.
Internal hardware error
Internal hardware error
Internal hardware error
Internal hardware error
Internal hardware error
Internal hardware error
Internal hardware error
Internal hardware error
Flame is detected in a
state in which no flame
is allowed to be seen
Low water pressure,
occurs when the
pressure drops below
Minimal_Pressure, or
when the pressure
drops below 11.6 psi.
Watchdog
communication error
Return sensor open
Supply sensor open
DHW sensor open
E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
Cause
wrongly programmed
BCU or PB
wrongly programmed
BCU or PB
wrongly programmed
BCU or PB
wrongly program-med
BCU or PB
wrongly programmed
BCU or PB
not enough waterflow
overheat exchanger
wrongly programmed
BCU or PB
wrongly programmed
BCU or PB
wrongly programmed
BCU or PB
wrongly programmed
BCU or PB
wrongly programmed
BCU or PB
wrongly programmed
BCU or PB
wrongly programmed
BCU or PB
wrongly programmed
BCU or PB
wrong earthing of
BCU and boiler
not enough water
pressure
wrong programmed
BCU or PB
malfunctioning return
sensor or not
connected
malfunctioning supply
sensor or not
connected
malfunctioning DHW
sensor or not
connected
Solving
reset BCU or replace BCU
and or display unit
reset BCU or replace BCU
and or display unit
reset BCU or replace BCU
and or display unit
reset BCU or replace BCU
and or display unit
reset BCU or replace BCU
and or display unit
check functioning of the
circulator.
check/open all valves that
might restrict the water
flow through the unit.
check for external system
circulator that influences
flow through the unit.
check if system resistance
exceeds the spare
capacity of unit circulator.
reset BCU or replace BCU
and or display unit
reset BCU or replace BCU
and or display unit
reset BCU or replace BCU
and or display unit
reset BCU or replace BCU
and or display unit
reset BCU or replace BCU
and or display unit
reset BCU or replace BCU
and or display unit
reset BCU or replace BCU
and or display unit
reset BCU or replace BCU
and or display unit
check earthing of BCU
and boiler
fill up the system and
check if there are any
water leakages
reset BCU or replace BCU
and or display unit
check connection to BCU
or check resistance NTC
sensor
check connection to BCU
or check resistance NTC
sensor
check connection to BCU
or check resistance NTC
sensor