Troubleshooting - Lennox GCM07N Service Manual

9.Troubleshooting

9.1 Display board
2 2
1
1
AU TO indicator
Thi s indicator illuminates whe n the air conditioner i s in AUTO operation.
2 2
DE FROST indicator (F or Cooling & H eating mo dels only)
Thi s indicator illuminates whe n the air conditioner starts defrostin g automati cally or
when the warm air control fea ture is activated in he ating oper ation.
TEMPERATUR E indicator
3
Displays the te mperature settings when the air condition er is operational.
OPERATION in dicator
4
This indicator fl ashe s after power is on and illuminate s when the unit is in operation.
TIMER indicator
5
This indicator il luminates when TIMER is set ON/OFF.
9.2 For all heat pump model
Indoor fan speed has been out of control for over 1 minute
Indoor room temp. or evaporator sensor is open circuit or short circuit
Over current protection of the compressor occurs 4 times
EEROM error
No over-zero signal
r Extinguish
Flash at 5Hz
☆
Signal receptor
4 5
3
Failure phenomenon Operation lamp
☆
☆
X
On
☆
35
Timer lamp
X
On
☆
☆
☆