20
CONTROL SIGNAL & MODE OPERATION TOTAL KW BOARD ACTION
W1 & Y/Y2
AUX HEAT
ON
5 KW
Stage 1 Heat on instantly
Cool blower on after 3 second delay
8 KW, 10 KW
Stage 1 Heat on instantly
Cool blower on after 3 second delay
15 KW
Stage 1 Heat on instantly
Cool blower on after 3 second delay
Stage 2 Heat on after 5 seconds delay
20 KW
Stage 1 Heat on instantly
Cool blower on after 3 second delay
Stage 2 Heat on after 5 seconds delay
Stage 3 Heat on after 10 seconds delay
25 KW
Stage 1 Heat on instantly
Cool blower on after 3 second delay
Stage 2 Heat on after 5 seconds delay
Stage 3 Heat on after 10 seconds delay
OFF —
Heat stages off instantly
Heat blower turns off after 40 second delay
W1, W2 & Y/Y2
AUX HEAT
ON
5 KW
Stage 1 Heat on instantly
Cool blower on after 3 second delay
8 KW, 10 KW
Stage 1 Heat on instantly
Cool blower on after 3 second delay
Stage 2 Heat on after 5 seconds delay
15 KW
Stage 1 Heat on instantly
Cool blower on after 3 second delay
Stage 2 Heat on after 5 seconds delay
Stage 3 Heat on after 30 seconds delay
20 KW
Stage 1 Heat on instantly
Cool blower on after 3 second delay
Stage 2 Heat on after 5 seconds delay
Stage 3 Heat on after 10 seconds delay
Stage 4 Heat on after 15 seconds delay
25 KW
Stage 1Heat on instantly
Cool blower on after 3 second delay
Stage 2 Heat on after 5 seconds delay
Stage 3 Heat on after 10 seconds delay
Stage 4 Heat on after 15 seconds delay
Stage 5 Heat on after 20 seconds delay
OFF —
Heat stages off instantly
Heat blower turns off after 40 second delay
G
FAN
ON — Fan blower on after 3 second delay
OFF — Fan blower off instantly
Y/Y2
HEAT PUMP & COOL
ON — Cool blower on after 3 second delay
OFF — Cool blower off after 40 second delay
Y1
HEAT PUMP & COOL
ON — Cool blower on after 3 second delay
OFF — Cool blower off after 40 second delay
Y1 & Y/Y2
HEAT PUMP & COOL
ON — Cool blower on after 3 second delay
OFF — Cool blower off after 40 second delay
Table 9. Control Board Operation - Continued
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