Specifications

Door switch does Door switch not functioning. Realign or replace door safety

not cut power to switch.

heating elements.

Controller over-temp. Alarm output device malfunction. Replace controller.

does not cut power

to furnace chamber. OTP relay malfunction. Replace relay.

Element shorted to ground. Replace faulty element.

Slow heatup. Low line voltage. Install line of sufficient size

and voltage (isolate furnace

from other electrical loads).

Heavy load in chamber. Lighten load in chamber to

allow heat to circulate.

Wrong heating element. Install proper element.

Heating element burned Replace element.

out.

Repeated element Overheating furnace. Keep furnace under maximum

burnout. temperature. Closer supervi-

sion of control setting.

Heating harmful materials. Enclose material in container.

Clean up spills in and on

chamber. Ventilate chamber by

leaving top vent slightly open

when heating known harmful

reagents.

Contamination from previous Replace insulation material.

burnout.

ROUBLESHOOTING