Slant/Fin VGH-299-CH Installation And Service Manual page 91

Lockout Error
code
116 LOW_WATER_P
RESSURE_SEN
SOR
118 WD_COMM_ER
ROR
119 RETURN_OPEN
120 SUPPLY_OPEN
122 DHW_OPEN
123 FLUE_OPEN
125 OUTDOOR_OP
EN
126 RETURN_SHOR
TED
127 SUPPLY_SHOR
TED
129 DHW_SHORTE
D
130 FLUE_SHORTE
D
132 OUTDOOR_
SHORTED
133 NET_FREQ_ER
ROR
134 RESET_BUTTO
N_ ERROR
135 PHASE_NEUTR
AL_ REVERSED
136 T_EXCHANGE_
BLOCK_ERROR
Description
Low water pressure,
generated when the
pressure drops below
Minimal_Pressure, or when
the pressure drops below
4.5 PSI .
Watchdog communication
error
Return sensor open
Supply sensor open
DHW sensor open
Flue sensor open
Outdoor sensor open
Return sensor shorted
Supply sensor shorted
DHW sensor shorted
Flue sensor shorted
Outdoor sensor shorted
Net freq. error detected by
the watchdog
Too many resets in a short
time period
Live and neutral of the
main voltage power supply
input are reversed
Exchange temperature
exceeded 194 ºF (90 ºC).
E93.1601EN032.C VGH installation manual
Cause Solving
Not enough water Fill up the system and
pressure check if there are any
water leakages
wrong reset BCU or replace BCU
programmed BCU and or display unit
or PB
malfunctioning check connection to BCU
return sensor or or check resistance NTC
not connected sensor
malfunctioning check connection to BCU
supply sensor or or check resistance NTC
not connected sensor
malfunctioning check connection to BCU
DHW sensor or or check resistance NTC
not connected sensor
malfunctioning flue check connection to BCU
sensor or not or check resistance NTC
connected sensor
malfunctioning check connection to BCU
outdoor sensor or or check resistance NTC
not connected or sensor or change CH-
wrong CH-mode mode
programmed
malfunctioning check connection to BCU
return sensor or or check resistance NTC
short circuiting sensor
malfunctioning check connection to BCU
supply sensor or or check resistance NTC
short circuiting sensor
malfunctioning check connection to BCU
DHW sensor or or check resistance NTC
short circuiting sensor
malfunctioning check connection to BCU
Flue sensor or or check resistance NTC
short circuiting sensor
malfunctioning check connection to BCU
Outdoor sensor or or check resistance NTC
short circuiting sensor
Wrong frequency Check frequency on the
from power grid or mains of the boiler (60Hz)
aggregate
Reset many times wait or disconnect and
by user or installer reconnect power supply
Fase and neutral Change fase and neutral
are wrongly
connected
water temperature Check
is above 194 ºF functioning. Check/open all
(90 ºC). valves that might restrict
water flow through the unit.
Check
circulator(s) that influences
flow
Check
resistance
spare capacity of the unit
circulator.
circulator
external system
through the unit.
if the system
exceeds the
91