SECTION IV – TROUBLESHOOTING

Symptom

Probable Cause

Corrective Action / Remedy

No hot water in tank

Circuit breaker tripped at source.

Reset circuit breaker.

 

High limit switch tripped.

Reset high limit switch.

 

Loose wires.

Torque screws holding wires.

 

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.

Water temperature in

Faulty thermostat.

Check thermostat adjustment. Monitor

tank below settings at

 

thermostat as described in Section III,

all times

 

Quarterly Inspection. Replace if necessary.

 

Heating element not working on all

Check to see that heating element is working

 

phases

on all phases, by checking the resistance

 

 

(ohms) value for each element and comparing

 

 

with the chart included in Section VI.

 

Heater improperly sized

Verify heater is properly sized for the flow rate

 

 

and temperature rise of your system. Replace

 

 

elements with proper size as necessary.

Relief valve discharges

Excessive temperature or pressure

Temperature and pressure relief valves are

continuously

in tank

made to operate if the water temperature

 

 

exceeds 210°F or water pressure exceeds the

 

 

pressure rating of the safety relief valve. If

 

 

trouble is excessive temperature, then

 

 

thermostat is not shutting off at the right setting

 

 

and thermostat must be replaced.

Tepid water

Blockage in cold water inlet to

Disconnect mixing valve and clean out cold

temperature too hot

mixing valve

water inlet pipe.

 

Mixing valve out of calibration

Re-calibrate mixing valve as described in

 

 

Section V, Service and Replacement of Parts,

 

 

Re-Calibrate Mixing Valve.

Tepid water

Blockage in hot water inlet to

Disconnect mixing valve and clean out hot

temperature too cold

mixing valve

water inlet pipe.

 

Mixing valve out of calibration

Re-calibrate mixing valve as described in

 

 

Section V, Service and Replacement of Parts,

 

 

Re-Calibrate Mixing Valve.

12

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Hubbell Electric Heater Company EMV manual Section IV Troubleshooting, Symptom Probable Cause Corrective Action / Remedy
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EMV specifications

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In summary, the Hubbell Electric Heater Company EMV series epitomizes the blend of efficiency, durability, and advanced technology in electric heating solutions. Its features cater specifically to the needs of commercial and industrial users, making it a preferred choice for those seeking reliable heating solutions in demanding environments. The combination of high efficiency, safety features, and smart technology positions the EMV series as a leading electric heater in the market today.
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