Product data

HWError Code.doc 02/09/01

Outdoor Air thermistor

malfunction

If the following occurs with thermistor:

Short condition: greater or = 194 deg F

Open condition: less or = -40 deg F

Check plug connection on main circuit board (CN17).

Check termistor cable connection at terminal board on

indoor and outdoor unit.

Check resistance of thermistor:

Short: Resistance less than 1.0 ohm

Open: Resistance is infinity

If out of range replace thermistor.

Indoor Fan failure

System senses continuous abnormal

indoor fan RPM operation.

Check plug connection CN3 (power supply).

Check plug connection CN4 (RPM detection)

Check plug connection CN8 (motor capacitor).

Set unit in fan mode only.

Check power supply at CN3 (pin 1 & 5):

009 : 50 ~ 114Vrms

012, 018 & 024 : 100 ~ 200Vrms

If no voltage measured replace board.

If voltage recorded replace motor

* Green LED on Front Grille