Hubbell Electric Heater Company V10 用户手册

 

 

18 

Circuit breaker tripped at source. 

Reset circuit breaker. 

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.