Hatco Imperial Série Manuel D'installation Et D'utilisation page 23

English
Symptom
Relief valve dribbles.
Relief valve opens.
High temperature limit
safety switch trips.
The error indicator light is
illuminated.
Chattering contactor or low
water cutoff circuit board
Heating element(s) burn
out.
Troubleshooting Questions?
If you continue to have problems resolving an issue, please contact the nearest Authorized Hatco Service Agency or Hatco for
assistance. To locate the nearest Service Agency, log onto the Hatco website at www.hatcocorp.com, select the Support pull-
down menu, and click on "Find A Service Agent"; or contact the Hatco Parts and Service Team at:
Telephone: 800-558-0607 or 414-671-6350
e-mail: support@hatcocorp.com
Form No. EBOOSTERM-0321
Probable Cause
No pressure reducing valve installed or incorrect
valve installed causing pressure build-up inside
booster tank.
Bypass in pressure reducing valve may be blocked. Clean bypass or replace with new valve with built in bypass.
Check valve or anti-siphon valve installed in the
feed line.
Unit is overheating.
Contactor may be sticking in closed position not
allowing unit to cycle off.
Temperature limit safety switch is defective.
Thermostat set too high.
Incoming water temperature too high causing
nuisance tripping of high temperature limit switch.
Loose connections or wire connection has
insulation under crimp.
Low voltage.
Probe may be fouled.
Contactor(s) may be bad.
Tank inadvertently drained leaving element(s) in a
dry condition.
Lime buildup in tank causing element(s) to split
and burn out.
TROUBLESHOOTING GUIDE
A pressure reducing valve with high pressure bypass must
be installed in the incoming water line to allow water to
expand back into the feed line.
Remove check valve or anti-siphon valve to allow for water
expansion or install a back pressure relief valve (P/N
03.02.039.00) on the incoming water line.
Thermostat may be set too high or is sticking. Recalibrate or
replace the thermostat.
Replace contactor(s).
If booster heater is not overheating, replace High Limit
Safety Switch.
Adjust or recalibrate, refer to "Thermostat Adjustment" in the
MAINTENANCE section.
Incoming water temperature should not be higher than
160°F (71°C).
Tighten all connections and check crimps
Check control circuit voltage or secondary voltage with
transformer.
Bypass probe by removing wire from low water cutoff probe
and grounding to tank. Clean or replace probe if chattering
stops.
Test contactor coils and replace if needed.
Replace element(s), and make sure tank is full of water at all
times. Check low water cut-off system for proper operation.
Replace element(s), and clean or delime tanks periodically.
A water softener or blended phosphate treatment system
may be required.
23
Corrective Action