Application Guide

• THERMOSTAT POTENTIOMETER/THERMOCOUPLE.
• Blocked front EXIT VENT, REAR INTAKE, or CLOGGED AYR FILTER.
• Inadequate house outlet/circuit tripping 15AMP RESET SWITCH.
When the heater low mode button is selected on the TOUCH KEYPAD, an audible BEEP will emit from the
MPCB and a low heat LED indicator on the KEYPAD will go on steady. The CROSS FLOW FAN &
MOTOR will turn on instantly. The low heat relay will energize after a (5) SECOND TIME DELAY turning
on the single heating element. Pressed a second time the relay drops out turning off the heater and then the
blower fan 20 seconds after. If both low and high heat relays are energized, pressing the low heat button will de-
energize the high heat relay leaving the low heat relay energized only.
When the heater high mode button is selected on the TOUCH KEYPAD, an audible BEEP will emit from the
MPCB and both low and high heat LED indicators on the KEYPAD will go on steady. This button shall
energize the high heat relay after a (5) SECOND TIME DELAY turning on a second heating element. Pressed a
second time the relay drops out and de-energizes both low and high heat relays turning off the heater and then 20
seconds later the blower fan.
NOTE: CROSS FLOW FAN & MOTOR is instantly ON and always operating when either the low or high
heat setting is ON. This fan is critical to maintaining an adequate air flow to properly dissipate and distribute
heat generated by IR HEATER ASSEMBLY with FUSIBLE LINK. Malfunctioning CROSS FLOW FAN &
MOTOR will cause heat to shut OFF or complete SHUTDOWN of INSERT.
NO HEAT, LIMITED HEAT OR SHUTTING DOWN
If the INSERT has a THERMOSTAT POTENTIOMETER and THERMO COUPLE:
• Turn THERMOSTAT all the way to the right (high setting).
• If still no heat, check power from MCPB for both HOT 750W spade terminals (high and low) and (1) neutral
spade terminal. If no voltage when on, change MCPB.
• If voltage is present at MCPB for both HOT 750W (high and low) and neutral spade terminals, check voltage
or continuity across FUSIBLE LINK. If FUSIBLE LINK is bad, replace IR HEATER.
• If heat comes on for a short time and stops with THERMOSTAT turned to high. (all the way to the right)
replace THERMOSTAT.
• If heat comes on for a while, INSERT shuts down completely and MPCB BEEPS 15 times, replace IR
HEATER. Check CROSS FLOW FAN & MOTOR to ensure it is spinning freely. If not operating
smoothly, or producing enough air flow, replace CROSS FLOW FAN & MOTOR.