Hatco GRN Manuale Utente

Form No. GRM-0707

TROUBLESHOOTING GUIDE

WARNING

To avoid any injury or damage the strip heater
must only be serviced by qualified personnel.

WARNING

To avoid any injury or damage to the strip heater
turn the power OFF at the disconnect
switch/circuit breaker and allow to cool before
performing any maintenance.

SYMPTOM

PROBABLE CAUSE

CORRECTIVE ACTION

Unit is turned “ON” but there
is no heat.

No power to unit.

Check circuit breaker and reset as
necessary. If power cord connected
check for damage to cord. If power cord
connected check power outlet.

Switch is defective.

Check input and output sides of the
switch for power. If proper power on
supply side but nothing on output side
replace switch.

Wiring is open.

Check for power at the heating element.
If no power at element check wiring for
break or bad connection. Repair or
replace as necessary.

Heating element defective.

Check heating element for continuity.
Using an ohm meter check the resistance
of element.

Resistance in ohms = voltage

wattage

Example: GRAH-48, 120 Volt is rated for
1100 watts.

(120)

= 14,400 = 13.09 ohms

Wattage 1100

Replace heating element if defective.

Heat is inadequate.

Unit mounted too high above
target area.

Excessive air movement
around strip heater target
area.

Incorrect power supply (low).

Lower unit, putting effective heat closer
to target.

Restrict or redirect air movement (ie. - air
conditioning duct or exhaust fan) away
from unit.

Check power supply to unit, making sure
it matches rating on the unit. If power
supply is incorrect, change to match
rating on unit.