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
