Nibe VVM 300 - Malfunction Diagnosis

9NIBE VVM 300
User guide
Dealing with malfunctions
In the event of malfunction or operating disturbances first
check the points below:
Low temperature or a lack of hot water
Air in boiler or system. ■
Large amounts of hot water were used. ■
Circuit or main MCB tripped. ■
Possible earth circuit-breaker tripped. ■
Mixer valve set too low (45). ■
Switch (8) set to “0”. ■
Tripped Miniature circuit-breaker (7) or Fine-wire fuse ■
(33). See “Dealing with malfunctions” – “Resetting the
miniature circuit breakers”.
Tripped temperature limiter (6). (Contact service)
■
Closed or throttled filler valve (46) to the heater. ■
Load monitor or external control may have been ■
blocked the electrical output.
Incorrectly set values for hot water production.
■
High hot water temperature
Mixer valve set too high. ■
Incorrectly set values for hot water production. ■
Low room temperature
Air in boiler or system. ■
Circuit or main MCB tripped. ■
Possible earth circuit-breaker tripped. ■
Tripped Miniature circuit-breaker (7) or Fine-wire fuse ■
(33). See “Dealing with malfunctions” – “Resetting the
miniature circuit breakers”.
Tripped temperature limiter (6). (Contact service)
■
Automatic heating control system settings not correct. ■
24 hour setting incorrectly set so that night reduction is ■
active during the day.
Circulation pump (16) stopped. See the section
■
“Dealing with malfunctions” – “Starting the pump”.
Close valves (44) and (50) in the radiator circuits.
■
Initial pressure in expansion vessel too low. This is ■
indicated by low pressure on the pressure gauge (42).
Contact the installer.
Load monitor or external control may have been
■
blocked the electrical output.
High room temperature
Incorrect values set on the automatic heating control ■
system.
If the operating disturbance cannot be rectified by means
of the above an installation engineer should be called.
If necessary set the switch to”
”. See the section,
“Switch position “
”.
The adjustment
screw
Switch position “ ”
In mode ” ” the boiler’s electronic controls are dis-
connected, the display window is not lit.
The immersion heater is controlled by a separate thermo-
stat. Available output in standby mode is 6 kW.
The automatic heating control system is not operational,
so manual shunt operation is required. This is done by
turning the adjustment screw to “manual mode” and then
turning the shunt knob to the desired position.
Max temperature of standby mode thermostat must be set
with regard to the heating system’s max permitted operat-
ing temperature, in connection with installation.
The circulation pump (16) and charge pump (40) are in
continuous operation.
When returning to normal mode do not
forget to reset the shunt knob to its origi-
nal position by turning the adjustment
screw to “A”.
NOTE!
LEK
LEK
Gammalt
LEK
A
r
t.n
r
.
611??
?
2
1
bar
3
04
Gammalt
GB
DK
DK
2
1
bar
3
04
2
1
bar
3
04
2
1
bar
3
04
2
1
bar
3
04
A BA BA BI II III
54.1°C
Varmvattentemp.
1.0
13.43
A BA BA BI II III
54.1°C
Varmtvandstemp.
1.0
13.43
A BA BA BI II III
54.1°C
Hotwatertemp.
1.0
13.43
A BA BA BI II III
54.1°C
Brauchwassertemp.
1.0
13.43
DE
LEK LEK
LEK