Instruction of SR81 Split Pressurized Solar Hot Water System
Page 50 of 59
appear, and at the same time sign blinks on the screen. It may indicate that system
has no fluid or pump R1 is damaged
If flow monitoring function is already activated, then tank heating is stopped until the error
message is removed. If possible, when error message is solved, monitoring function will be
reactivated.
Note:
if VFS sensor is selected, then when error message appears, it is possible to
check the reason of VFS error under check menu.
1.
Checking menu L/M display “ -------“, it indicates VFS function is activated, but Grundfos
flow meter VFS is not connected to the controller.
2.
Checking menu L/M displays “00”, it indicates VFS has no flow, it may indicate that
system has no fluid or pump R1 is damaged
Manual Structure
Main
men
u
Subm
enu
1
Subm
enu 2
Facto
ry
set
Adjus
table
range
Step
per
adjust
Descr
iption
Main menu
FS
Select flow sensor
GFDS
VFS
OFF
OFF
OFF /
ON
Grundfos flow sensor
1-12
Measuring
range
of
Grundfos flow sensor is
(1-12L/Min)
2-40
Measuring
range
of
Grundfos flow sensor is
(2-40 L/min)
