18-CE15D1-1C-EN
45
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1. See sequence of operation for Single stage cooling
operation above (steps 1-3).
2. R-Y2 contact on the thermostat close sending
24VAC to Y2 low voltage terminal on the IFC.
Technician should read 24VAC between Y2 and B/C.
3. 24VAC is sent to the OD unit via thermostat wiring.
4. The indoor airflow ramps to 2nd stage airflow. The
seven segment LED for example will read:
•
C
CL
L2
2
= Cooling, Stage 2
•
A
AR
RF
F
= Airflow
•
1
16
60
0
= 1600 calculated cfm (value shown x 10)
5. When the temperature is lowered enough to satisfy
the thermostat setting, contacts R-Y1-Y2-G will
open.
The OD unit shuts off and the indoor blower shuts
off, unless a blower off delay has been enabled in
the IFC setup menu options. The seven segment
LED will read
I
ID
DL
L
= Idle, no thermostat demand.
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N
No
otte
e:: Factory supplied Y1-O jumper must be removed
for proper seven segment LED readout and
defrost operation.
1. R-Y1-G contacts on the thermostat close sending
24VAC to the Y1 and G low voltage terminals on the
IFC. Technician should read 24VAC between Y1-B/C
and between G-B/C.
2. 24VAC is sent to the OD unit via thermostat wiring.
3. The indoor blower ramps to the HP heating airflow.
The seven segment LED for example will alternately
read:
•
H
HP
P1
1
= Heat Pump Heating, Stage 1
•
A
AR
RF
F
= Airflow
•
0
08
80
0
= 800 calculated cfm (value shown x 10)
4. When the temperature is raised enough to satisfy
the thermostat setting, contacts R-Y-G will open.
5. The OD unit shuts off and the indoor blower shuts
off, unless a blower off delay has been enabled in
the IFC setup menu options. The seven segment
LED will read
1
1 D
DL
L
= Idle, no thermostat demand.
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1. See sequence of operation for single stage heat
pump operation above (steps 1-3)
2. R-Y2 contact on the thermostat close sending
24VAC to Y2 low voltage terminal on the IFC.
Technician should read 24VAC between Y2 and B/C.
3. 24VAC is sent to the OD unit via thermostat wiring.
4. The indoor airflow ramps to 2nd stage airflow. The
seven segment LED for example will read:
•
H
HP
P2
2
= Heat Pump Heating, Stage 2
•
A
AR
RF
F
= Airflow
•
1
16
60
0
= 1600 calculated cfm (value shown x 10)
5. When the temperature is raised enough to satisfy
the thermostat setting, contacts R-Y1-Y2-G will
open.
6. The OD unit shuts off and the indoor blower shuts
off, unless a blower off delay has been enabled in
the IFC setup menu options. The seven segment
LED will read
1
1 D
DL
L
= Idle, no thermostat demand.
