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TROUBLESHOOTING
THE OPERATIONS MUST BE CARRIED OUT BY TECHNICAL QUALIFIED PERSONNEL HAVING THE REQUISITES
UNDER LAW REQUISITES AND IN CONFORMITY WITH THE SAFETY REGULATIONS IN FORCE.
THE INTERVENTIONS WITHIN THE WARRANTY PERIOD WILL BE CARRIED OUT BY AUTHORIZED SERVICE
CENTERS.
BEFORE RESETTING AN ALARM, IDENTIFY AND ELIMINATE ITS CAUSE.
REPEATED RESETS MAY CAUSE SERIOUS DAMAGES.
In certain machine configurations, some safeties may be placed in series and lead back to a single input on the electronic
module.
Therefore, check on the electrical diagram whether the device to which the alarm corresponds has other devices or
safeties connected in series.
Below is a list of the possible causes of alarms.
HIGH PRESSURE
(in cooling)
1. high water temperature (see operating limits)
2. high air temperature (see operating limits)
3. coil dirty / clogged
4. fans don’t work / low speed
5. Manostat/transducer: loose electric contacts/terminals,
wiring cables interrupted
6. Anti-condensation gas in the cooling circuit
7. Too much refrigerant
8. Check the trigger point for the manostat and
transducer
9. Check the manostat or transducer pressure control
point (deposits of oil, dirt, pin blocked mechanically)
LOW PRESSURE
(in cooling)
1. low air temperature (see operating limits)
2. low water temperature (see operating limits)
3. insufficient water flow to the exchanger (high thermal
difference between input and output)
4. not CONSTANT flow (for example, if the pumps are
turned off, certain areas of the plant are excluded or
included, other uses are isolated, etc )
5. Water filter clean / valves open /air bubbles in the
plant
6. dirty exchanger
7. Manostat/transducer: loose electric
contacts/terminals, wiring cables interrupted
8. refrigerant circuit empty, visible leaks of refrigerant/oil,
insufficient charge
9. Blocked dehydrator filter
10. thermostatic device not operating correctly
11. Check the trigger point for the manostat and
transducer
12. Check the manostat or transducer pressure control
point (deposits of oil, dirt, pin blocked mechanically)
FAULTY PROBE
1.
Identify the part on the wiring diagram.
2.
Loose electric contacts/terminals, leads broken
3.
Check the correct probe ohmic level (using a
tester)
4.
Change the probe.
5.
Check the electronic module configuration (only an
authorised service centre can do this)
6.
Change the electronic module
FAULTY PRESSURE TRANSDUCER
1.
Identify the part on the wiring diagram
2.
Loose electric contacts/terminals, leads broken
3.
Check the pressure test points are in working
order
4.
Change the part
5.
Check the electronic module configuration (only an
authorised service centre can do this)
6.
Change the electronic module
Summary of Contents for WSAN-XPR 21
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