en – Original instructions
44
e-IXP(A), e-IXPC(A), e-IXPF(A) – Additional Installation, Operation and Maintenance Manual
7.9
When switched off, the unit turns in the opposite direction
Cause
Solution
Check valve faulty
Replace the check valve
Foot check valve faulty
Replace the foot valve
7.10
The unit starts and stops too frequently
The unit with automatic start and stop device starts and stops too frequently.
Cause
Solution
Incorrect priming (there are air bubbles in the suction pipe or in
the unit)
Repeat the priming procedure
Check valve locked in closed or partially closed position
Replace the check valve
Foot valve locked in closed or partially closed position
Replace the foot valve
Starter set incorrectly, or faulty
Adjust or replace the starter
Expansion vessel
•
no pre-charge, or
•
undersized, or
•
not installed
•
Pre-charge the expansion vessel, or
•
replace the expansion vessel with another suitable one, or
•
install an expansion vessel
Oversized unit
Contact Xylem or its Authorised Distributor
7.11
The unit does not stop
The unit with automatic start and stop device never stops.
Cause
Solution
The required flow rate is greater than the one expected
Reduce the required flow rate
Discharge pipe leaking
Eliminate the leaks
Three-phase motor turning in the wrong direction
Check the direction of rotation and change if necessary
Pipes, on-off valves or filter clogged with impurities
Remove the impurities
Starter set incorrectly, or faulty
Adjust or replace the starter
The unit runs but there is little or no flow rate
See paragraph 7.8
7.12
The unit is leaking at the mechanical seal
Cause
Solution
Damaged seal due to:
•
wear
•
thermal shock
•
chemical incompatibility
•
other
Replace the seal and check it to identify the cause of the
damage. Contact Xylem or its Authorised Distributor
7.13
The frequency converter is in error mode or turned off
The frequency converter (if present) is in error mode or turned off
Cause
Solution
See the frequency converter manual
See the frequency converter manual
