Hubbell Electric Heater Company " SE " - Manual (Page 14)

14
SECTION IV –
TROUBLESHOOTING
Symptom Probable Cause Corrective Action / Remedy
Circuit breaker tripped at
source. Reset circuit breaker.
On/Off switch in ‘OFF’
position, if installed. Turn switch to ‘ON’ position.
Circuit breaker at control
cabinet tripped, if installed. Reset circuit breaker.
Blown fuse in element fuse
block, if installed. Replace fuse.
Blown fuse in transformer, if
installed. Replace fuse.
High limit switch tripped. Reset high limit switch.
Loose wires. Tighten wires. Torque screws per
torque chart included in Section
VI.
Heating element inoperable. Check heating element operation
by clamping an Amprobe around
each wire to the element. The
ampere reading should agree with
the nameplate ‘AMP’ figure.
Low line voltage. Have source electrical system
checked by an electrician.
Faulty thermostat. Move thermostat dial through full
range. A definite ‘click’ should be
heard. If not, replace thermostat.
Faulty low water cut-off, if
installed. Check to see if tank is full of
water. If not, fill tank. If problem
continues and tank is full, check
for continuity between the
common and normally open
contact of the relay board. If
continuity is not observed, replace
low water cut-off.
No hot water
Magnetic contactor does not
energize. Replace complete magnetic
contactor. Because of the design
of this particular contactor, it is
more desirable to replace complete
control rather than rebuilding coil,
contacts and springs, etc.