Art.-Nr. 676.15.67.00
Dated 2021/09/09
- 15 -
GB
1 2
M a l f u n c t i o n s / t r o u b l e s h o o t i n g
If an error message is present, it is shown in the display of the control.
Please refer to the corresponding instructions for the control.
Fault
Possible cause
Troubleshooting
Pump noise
Air in the system
Vent and/or flush
System pressure too low
Check pressure, increase if
necessary
Pump runs, but no flow rate
appears on the flow meter.
Air in the system
Vent and/or flush
System pressure too low
Check pressure, increase if
necessary
The flow meter is jammed or
defective.
Check the functionality of the
flow meter.
The shut-off device is closed. Open the shut-off device
Throttle for flow rate adjust-
ment is closed.
Open the throttle
The tank cools at night.
When the pump in the supply
and return line is switched off
at different temperatures, the
temperature of the collector
exceeds the outside temper-
ature during the night.
The gravity brake does not
close.
Check the position of the ad-
justing handle and inspect the
gravity brake for leaks (jammed
splinters, dirt particles in the
sealing surface).
Change the wiring. Do not con-
nect the solar heat exchanger
directly, but pull the supply lines
downwards in a U-shape.
This siphon supports the gravity
brake.
If necessary, a two-way valve
can be mounted which is
switched at the same time as
the pump.
Incorrect currents as a result
of in-pipe circulations, partic-
ularly in short pipe networks
with a low drop in pressure.
Installation of a gravity brake or
thermal insulation loop (siphon)
in the supply line.
Summary of Contents for tubra- PGS multi
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Page 6: ...Art Nr 676 15 67 00 Stand 2021 09 09 6 D 3 2 Abmessungen Platzbedarf 3 3 Druckverlust ...
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Page 26: ...Art Nr 676 15 67 00 Dated 2021 09 09 6 GB 3 2 Dimensions required space 3 3 Pressure loss ...
Page 38: ...Art Nr 676 15 67 00 Dated 2021 09 09 18 GB 15 2 2 Grundfos ...
Page 39: ...Art Nr 676 15 67 00 Dated 2021 09 09 19 GB ...
Page 41: ...I tubra PGS multi Stazione pompa per impianti solari Istruzioni di assemblaggio e d uso ...
Page 59: ...Art Nr 676 15 67 00 Ultimo aggiornamento 2021 09 09 19 I 15 2 2 Grundfos ...