English (GB)
18
9. Fault finding the product
If the pump has detected one or more alarms, the first LED
switches from green to red. When an alarm is active, the LEDs
indicate the alarm type as defined in fig. 23.
When there is no active alarm anymore, the operating panel
switches back to operating status and the first LED switches from
red to green.
Fig. 23 Fault finding table
If multiple alarms are active at the same time, the
LEDs only show the error with the highest priority.
The priority is defined by the sequence of the table.
DANGER
Electric shock
Death or serious personal injury
- Switch off the power supply before starting any
work on the product. Make sure that the power
supply cannot be accidentally switched on.
CAUTION
Hot surface
Minor or moderate personal injury
- The pump housing may be hot due to the pumped
liquid being scalding hot. Close the isolating valves
on both sides of the pump and wait for the pump
housing to cool down.
CAUTION
Pressurised system
Minor or moderate personal injury
- Before dismantling the pump, drain the system or
close the isolating valves on both sides of the
pump. The pumped liquid may be scalding hot
and under high pressure.
Status Fault Display Solution
Alarm
The pump stops.
The pump is
blocked.
Deblock the shaft.
See section
9.1 Deblocking the
shaft.
Warning
The pump keeps
running.
The supply voltage
is low.
Make sure that there
is sufficient voltage
supply to the pump.
Alarm
The pump stops.
Electrical error.
Replace the pump and
send the pump to the
nearest Grundfos
Service Center.
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