Slant/Fin VHG-100-CH, Installation And Service Manual

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118
E93.1901EN032 Installation and Service Manual SlantFin VGH-CH / CO
Block-
ing
code Error Description Cause Solving
164 LOWEXFLOW_P
ROTECTION Flow is too low,
demand needs to be
stopped with fan at
ignition speed*, but no
error needed to be
stored at this time not enough water flow
through heat
exchanger check the circulator
operation.
check/open all valves that
might restrict water flow
through the unit.
check external system
circulator(s) influencing
the flow through the unit.
check if system resistance
exceeds the spare
capacity of the unit
circulator.
165 VSUPPLY_TOO_
LOW Main supply voltage
too low for more than
60 seconds dip in power supply to
boiler check power supply
166 VSUPPLY_TOO_
HIGH Main supply voltage
too high for more than
60 sec. peak in power supply
to boiler check power supply
Warnings
Warning
no. Warning Description Cause Solving
200 CC_LOSS_
COMMUNICATION Cascade System:
Managing cascade control
lost communication with
one of the depending. connection between
cascaded boilers is
interrupted or wiring
is broken check wiring
between boiler or
distance between
boilers is to big
202 APP_SELECTION_
ERROR Unknown appliance model
selected wrongly
programmed
parameters replace BCU
203 CC_LOSS_BOILER_
COMM Dual Cascade System:
Managing cascade control
lost communication with
one of the depending. connection between
cascaded boilers is
interrupted or wiring
is broken check wiring
between boiler or
distance between
boilers is to big
204 OUTDOOR_WRONG T_Outdoor sensor
measures open/shorted malfunctioning
outdoor sensor or
not connected or
wrong CH-mode
programmed check connection to
BCU or check
resistance NTC
sensor or change
CH-mode
205 T_SYSTEM_WRONG T_System sensor
measures open/shorted malfunctioning
system sensor or
not connected check connection to
BCU or check
resistance NTC
sensor
206 T_CASCADE_WRONG T_Cascade sensor
measures open/shorted
malfunctioning
cascade sensor or
not connected check connection to
BCU or check
resistance NTC
sensor
Table 13.2
Table 13.3