Instructions / Assembly

en – Original Instructions
38 Installation, Operation and Maintenance Manual
7 Troubleshooting
7.1 Precautions
WARNING:
Maintenance must be done by a technician possessing the technical
-
professional requirements
outlined in the current
regulations.
WARNING:
Observe the safety requirements in
section
5 Use and Operation
on page
30
and section
6
Maintenance
on page
36
.
WARNING:
If a fault cannot be corrected or is not mentioned, contact Xylem or the
Authorized Distributor.
7.2 Error signals
The pump is equipped with self-diagnostics and malfunction detection. Defects detected by the
pump system are signaled to the user with alternating short and long LED light flashes.
This function may be switched off in some special OEM versions.
Operating mode / Error code
LED light status
Normal operation, the pump is running Continuous on
Air purge sequence is active Blinking 200 ms on - 200 ms off - 200 ms on…
Standby mode Blinking 50 ms on - 1.5 s off - 50 ms on…
Low voltage failure Blinking 1 x short – 1 x long…
Overtemperature failure Blinking 3 x short – 1 x long…
Speed feedback failure Blinking 4 x short – 1 x long…
Blocked rotor Blinking 5 x short – 1 x long…
7.3 Pump not running
Cause
Remedy
Not connected or connected incorrectly Connect correctly
The pump is in standby mode Turn the control knob into the operation range,
see section
5.3 First starting
on page
30
The slider of the timer is set in “Off” position
Set it to “ ” or “On” position, see point
4
of
section
5.5 Setting the timer
on page
32
Pump too hot, dry operation- or overheating
protection active
Allow to cool, pump restarts automatically
Pump blocked See section
6.4 Disassembly
on page
37
7.4 Pump running for 1 minute periods only (temperature controlled models only)
Cause
Remedy
Water temperature signal is interrupted Replace pump