2
3
Mode Switch
Fan Switch #1
Fan Switch #2
Calling
Operation
6
Cool
On
Lo
Stage 2
2° Above Set
ID fan low continuous, compressor #1 and #2 and OD blower high cycle as needed
7
Cool
Auto
Hi
No
No functions occur in this mode
8
Cool
Auto
Hi
Stage 1
1° Above Set
ID fan high, compressor #1 and OD blower low cycle as needed
9
Cool
Auto
Hi
Stage 2
2° Above Set
ID fan high, compressors #1 and #2 and OD blower high cycle as needed
10
Cool
On
Hi
No
ID fan high continuous
11
Cool
On
Hi
Stage 1
1° Above Set
ID fan high continuous, compressor #1 and OD blower low cycle as needed
12
Cool
On
Hi
Stage 2
2° Above Set
ID fan high continuous, compressors #1 and #2 and OD blower high cycle as needed
13
Off
Auto
Lo or Hi
N/A
No functions occur in this mode
14
Off
On
Lo
N/A
ID fan low continuous
15
Off
On
Hi
N/A
ID fan high continuous
16
Gas Heat
Auto or On
Lo or Hi
No
No functions occur in this mode
17
Gas Heat
Auto or On
Lo or Hi
Stage 1
1° below set
Low gas heat will be energized to run
18
Gas Heat
Auto or On
Lo or Hi
Stage 2
5° below set
Low gas heat and high gas heat will be energized to run*See note 2*
19
Elec Heat
Auto or On
Lo or Hi
No
Nothing is operating in this mode
20
Elec Heat
Auto or On
Lo or Hi
Stage 1
1° below set
Heat pump will run ID fan high, Compressor #1 and #2 with reversing valve #1 and #2 and the OD fan
high
21
Elec Heat
Auto or On
Lo or Hi
Stage 2
5° below set
Heat pump will run ID fan high, Compressor #1 and #2 with reversing valve #1 and #2, OD fan high and
low gas heat will be energized to run *See note 2 & 3*
22
Elec Heat
Auto or On
Lo or Hi
Stage 3
7° below set
Heat pump will run ID fan high, Compressor #1 and #2 with reversing valve #1 and #2, OD fan high and
low and high gas heat will be energized to run *See note 2 & 3*
Notes:
1) When 2nd stage cooling is activated, it stays on until setpoint is satisfied.
2) When 2nd or 3rd stage heating is activated, it stays on until setpoint is satisfied.
When a heating stage is running for more than 20 minutes without reaching setpoint then the next available heating stage will be energized.
3) The word “DIFF” will display on the LCD when 2nd stage heat(Low gas furnace) is operating.
