Xylem Fixed speed booster sets programming manual/Electronic control board SM30 - Manual (Page 55)

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12 TROUBLESHOOTING 12 TROUBLESHOOTING 12 TROUBLESHOOTING 12 TROUBLESHOOTING
Maintenance and repair operations must be carried out by qualified personnel.
Before doing any work on the set, disconnect the electric power supply and ensure that there
are no hydraulic components under pressure.
Fault Cause Remedy
1. Electric power supply
disconnected Connect power supply 1. Board off
2. Fuse burnt out in panel Check the 24 Vac supply voltage in the
electric panel, downstream from the
transformer of the auxiliaries.
Replace burnt-out fuse.
1. Incorrect programming. Program the start/stop values.
Check timing.
2. Frequent
starting and
stopping
2. Incorrect adjustment of pressure
switch or sensor thresholds. Increase the differential pressure or the
stop pressure.
3. DIFFERENT
SENSORS 1. Different sensors connected to
AI1 and AI2. Check that, with FEEDBACK set on
AI1/AI2, the pressure/level sensors
connected to AI1 and AI2 are of the
same type and the values read are
congruent.
4. FLASH
INIT.ERROR/
F.RAM
INIT.ERROR 1. Data loss errors in the internal
memories of the board. Reprogram the parameter values
congruent with the type of system.
13 TAKING OUT O 13 TAKING OUT O 13 TAKING OUT O 13 TAKING OUT OF SERVICE F SERVICE F SERVICE F SERVICE
Respect the regulations and laws in force for waste disposal, also for the packaging.