Grundfos BoosterpaQ Hydro MPC, Installation And Operating Instructions Manual

Page: 24 / 58

24
10.6 Alarm
The
Alarm
menu gives an overview of current alarms and
warnings.
In this menu it is possible to reset alarms and to see the alarm
log.
10.6.1 Alarm (3)
Fig. 22
Alarm
Description
A fault in the Hydro MPC booster set or one of the components
monitored can cause an alarm or a warning . Besides the
fault signal via the fault signal relay and the red indicator light on
CU 351, an alarm can also cause a change of operating mode,
for instance from
Normal to Stop . A warning only causes a fault
indication.
The table shows the possible causes of fault together with an
alarm code number, and whether they result in an alarm or a
warning. It also shows to what operating mode the booster set
changes in case of alarm, and whether restart of the booster set
and reset of the alarm is manual or automatic.
The table also shows that the reaction to some of the fault causes
mentioned can be set in the
Settings
menu. See
10.7.32 Monitoring functions (4.4) to 10.7.39 External fault
(4.4.4) .
* Level 1 is the tank level where a warning is indicated in case
of water shortage. Level 2 is the tank level where an alarm
is indicated and the pumps stop in case of water shortage. For
further information, see
10.7.34 Dry-running protection with
pressure/level switch (4.4.1.1) and 10.7.36 Dry-running protec-
tion with level transmitter (4.4.1.3) .
TM
03
22
91
40
05
Fault
W
arning(
)/
ala
rm(
)
Change
of
operating
m
ode
to
Reset
of
ala
rm
Restar
t
Set
in
the
Settings
me
n
u
Alar
m
code
Water shortage,
level 1*
Auto 206
Water shortage,
level 2*
Stop Man/auto X 214
Max. pressure
Stop Auto 210
Min. pressure
Auto
X 211
Stop Man
Alarm, all pumps
Stop Auto 203
External fault
Auto
X 3
Stop Man
Dissimilar sensor
signals
Auto 204
Primary sensor
(without redundant
primary sensor)
Stop Auto 89
Fault, sensor
Auto 88
Communication
fault
Auto 10
Phase failure
Auto 2
Undervoltage,
pump
Auto
7,40,
42,73
Overvoltage, pump
Auto 32
Overload, pump
Auto
48,50,
51,54
Overtemperature,
pump
Auto 65,67
Other fault, pump
Auto 76,83
Internal fault,
CU 351
Auto
72,83,
157
Internal fault,
IO 351
Stop Auto
72,83,
157
VFD, not ready
Auto 213
Fault, Ethernet
Auto
231,
232,
233
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