12-pin Plug (PL-1) on Easy Select Board
1. Unplug harness from board.
2. Check for appropriate voltages on pins with Easy Select Board
screw terminals jumpered. (See Table 7 for values and see
example below.)
If proper signals are not present, replace Easy Select Board. If
present at board and not at 16-pin connector, wiring harness is
defective.
Troubleshooting Example:
Motor is not running on a call for heat-pump heating. System is a
single-speed heat pump.
1. After performing checks in Thermostat section, follow steps 1
thru 5 in Wiring Harness section. Then proceed with example.
2. With all thermostat wires removed from Easy Select Board,
place a jumper wire between R and Y/Y2 low-voltage screw
terminals on the Easy Select board.
3. Check Table 7 for pin number on 16-pin connector associated
with the Y/Y2 signal. The correct pin is #14. The far right
column shows that (-) 12vdc should be present between pin
#14 and pin #1 (common) on the 16-pin connector.
4. Set meter to read DC voltage. Place meter between pins #1
and #14 and check for (-) 12vdc (common side of meter on pin
#1). If signal is present, the problem is in the module or motor.
If signal is not, problem is either in wiring harness or Easy
Select Board.
These steps can be repeated for other modes of operation.
To check Easy Select Board:
1. Leave jumper wire in place between R and Y/Y2.
2. Check Table 7 under "Wiring Harness Connection to Easy
Select Board" column and row for pin #14 to see pin# on Easy
Select Board that should have voltage. The correct pin is #2.
The column on far right will show voltage that should be
present between pin #2 and #9 (or #10 common).
3. Place meter between pins #2 and #9 on Easy Select Board and
check for (-) 12vdc.
4. If voltage is present, the wiring harness is bad; if not, the Easy
Select Board is bad.
VERIFY MOTOR WINDING SECTION:
Before proceeding with module replacement, check the following
to ensure motor winding section is functional. With control module
removed and unplugged from winding section:
1. The resistance between any 2 motor leads should be similar.
2. The resistance between any motor lead and the unpainted
motor end plate should be greater than 100K ohms.
If motor winding section fails one of these tests, it is defective and
must be replaced.
CARE AND MAINTENANCE
For continuing high performance, and to minimize possible
equipment failure, it is essential that periodic maintenance be
performed on this equipment. The only required maintenance that
may be performed by the consumer is filter maintenance.
→ Fig. 17—Control Signals (Easy Select Board & 16-Pin Plug)
A00114
EASY SELECT
D
H
R
W
1
W
2
Y
1
Y/ Y
2
G
O
C
HEATER/MOTOR
CEBD430226-01B CESS430226-01B
AUX HEAT KW/CFM
0-30
1075
SEC1 SEC2
J1
J2
AC/HP SIZE
036 030 024 018
AC
HP-COMFORT
HP-EFF
NOM HI
ENH
LO
SYSTEM TYPE
AC/HP CFM ADJUST
ON/OFF DELAY
CONTINUOUS FAN
MED HI YELLO
AUX1 HUM1
AUX2
24VAC
GRY
HUM2
YEL
WHT
BLK
ORN
BLU
VIO
0-20
875
0-10
725
0
90
30
90
0
0
0-5
625
TM
J2 JUMPER – PULL FOR
HEAT STAGING
12-PIN CONNECTOR
(PL–1)
PIN 1
PIN 12
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
16-PIN PLUG
DEHUMIDIFICATION INPUT
24 VAC HOT
AUXILARY HEAT STAGE 1
AUXILIARY HEAT STAGE 2
LOW SPEED COMPRESSOR
SINGLE OR HI SPEED COMPRESSOR
FAN
REVERSING VALVE
COMMON
J1 JUMPER – PULL FOR
DEHUMIDIFICATION CONTROL
LOW VOLTAGE SCREW TERMINALS
15
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