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506248-01 Page 11 of 14Issue 0902
Figure 9
208/230V-1-60
G
W1
CRO
BLK
RED
YEL
RED
CONTACTOR
THERMOSTAT
HIGH PRESSURE
SWITCH
(IF USED)
L1
T1
T2
L2
C
H
F
CONDENSER
FAN MOTOR
COMPRESSOR
CONTACTOR
COMPRESSOR
CONTACTOR
DUAL
CAPACITOR
COMPRESSOR
TRANSFORMER
C
S
R
WHT
L2
L1
BLK
BRN
PUR
RED
RED
BLK
208V
240V
24V
INDOOR
BLOWER
MOTOR
S4
S1
K1
T1
B3
B4
K1-2
C12
B1
K1-1
BLU
YEL
C4
CAPACITOR
H
M
L
C
SEE CHART
FOR WIRING
NO
NC
C
P-3
BLOWER
CONTROL
A15
NC
C
CMC1
BLK
C
G
XFMR-R
R
XFMR-C
W1
C
L
R
O
Y1
FAN
O-OUT
LO-PS
DF
HI-PS
COMMON
Y1 OUT
2
2
CMC1
S6
L1
24 V
FUSE
Y
A15
BLOWER
CONTROL
W2
RED
YEL
BLU
WHT
GRN
ORN
RED
BLU
BLU
YEL
BLU
BLK
BLK
DEFROST
CONTROL
BLU
WHT
REVERSING
VALVE
DEFROST
T'STAT
DEFROST CONTROL
P-1
P-2
P-4
P-6
P-5
CONNECTION MUST BE JUMPERED
WHEN PRESSURE SWITCH IS NOT USED.
2
MOTOR
SPEED TAPS
L
M
HC
Unit
Factory Shipped
Settings
Cooling Input (BLK)
24 LOW
30 MED
36 HIGH
42 LOW
48 MED
60 HIGH
BLOWER SPEED CHART
S79
LOW
PRESSURE
SWITCH
(IF USED)
Note: Because the pressure switches are monitored only when "Y1" (Input) is active, the
code for pressure switch open will not be seen when "Y1" is off. Instead, the
“Normal Operation" or “Anti-Short Cycle Lockout” code will be seen.
When a pressure switch opens and causes a short cycle lockout,
the pressure switch-open code will be seen until it closes, then the
short cycle lockout code will flash unless it has already expired.
DIAGNOSTIC DISPLAY
Mode Green LED Red LED
No Power to Board Off Off
Normal Operation/ Power to Board Simultaneous Slow Flash
Anti-Short Cycle Lockout Alternating Slow Flash
Low Pressure Switch Fault Off Slow Flash
Low Pressure Switch Lockout Off On
High Pressure Switch Fault Slow Flash Off
High Pressure Switch Lockout On Off
NOTE - If any of the original wire is replaced,
the same size and type wire must be used.
Use copper conductor only, min. 75°C wire.
WARNING - Electric shock hazard. Unit must
be grounded in accordance with national and
local codes.
Line voltage field installed.
W1 & W2 can be used to stage electric heat
accessory on 15 & 20kW models.
5, 7.5, & 10kW heater accessories function
off W1 only.
Connection Diagram
Single Phase – PSC Motor
P/N 48349-001