Hubbell-electric-heater-company A User Manual download pdf (Page 18)

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.

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.

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Hubbell-electric-heater-company A User Manual Page 18