Hubbell Electric Heater Company V15 - Manual (Page 19)

19
SECTION IV –
TROUBLESHOOTING
Symptom Probable Cause Corrective Action / Remedy
Circuit breaker tripped at source. Reset circuit breaker.
On/Off switch in ‘OFF’ position Turn switch to ‘ON’ position
Blown fuse in transformer, if
installed. Replace fuse.
Circuit breaker at control cabinet
tripped, if installed. Reset circuit breaker.
Blown fuse in element fuse block,
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.