Carrier 38YDB Wiring Diagram

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DUAL CAPACITY
L1
SCHEMATIC DIAGRAM (LADDER FORM)
CH
21
11
START
CAP
EQUIP
GND
5 1
START
C L
RELAY
2
11 21
PL1 1 2 3
D C C
HP/AC C SEV
O
Y 2
Y 1
W
1
C
R
TO INDOOR UNIT
NOTES:
1. Compressor furnished with inherent thermal protection.
2. Fan motor furnished with inherent thermal protection.
3. To be wired in accordance with National Electric Code
and local codes.
4. Outdoor unit control requires a minimum of 27 VA,
24 VAC control power.
5. Use copper conductors only. use conductors suitable
for at least 75°C (167°F).
6. If indoor section has a transformer with a grounded
secondary, connect the grounded side to "C".
7. If any of the original wire, as supplied, must be replaced,
use the same or equivalent wire.
8. Check all electrical connections inside control box for
tightness.
9. Do not attempt to operate unit until service valves have
been opened (back seated)
10.Must use thermostat listed in pre-sale literature.
11.Compressor windings shown for 2 cylinder operation.
For 1 cylinder operation reverse R and S markings.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
PC 101 Catalog No. 533-80064
Tab 5a 5a

Wiring Diagrams

L2
COMP
R
23
C
CH
COMP
23
CAP
C
H
S
RVS
CH
CL
4 5 1 2
HI LO PL2
RVS C
LPS LPS
1
PL3
2
3
HPS
HPS
1
PL4
2
OFM
OAT
-t°
OAT 1
2
OCT
-t°
4
PL5
OCT
5
VC
FAN
BRN
CAP
VH
BLU
ODF
VPS
BLK
A B C D
L 2
CCH
YEL
CCH
RED
-LEGEND-
FACTORY POWER WIRING COMM
FIELD POWER WIRING
COMP
FIELD CONTROL WIRING
HPS
FACTORY CONTROL WIRING
LPS
COMPONENT CONNECTION
OAT
FIELD SPLICE
JUNCTION
OCT
CL CONTACTOR L OW CAPACI TY (24 V COIL)
OFM
CRANKCASE HEATER
CCH
RVS
CONTACTOR HI GH CAPACI TY (24 V COIL)
CH
STATUS
CAPACITOR
CAP
DUAL CAPACI TY CONTROL VPS
DCC
FUNCTION LIGHT (STATUS)
CODE ON UNIT
CONSTANT FLASH / NO PAUSE NO DEMAND / STAND BY
ONE FLASH W/ PAUSE LOW-CAPACITY OPERATION
HIGH-CAPACITY OPERATION
TWO FLASHES W/ PAUSE
THREE FLASHES W/ PAUSE OUTDOOR THERMISTOR FAILURE
FOUR FLASHES W/ PAUSE COIL THERMISTOR FAILURE
THERMISTOR OUT OF RANGE
ALT 3 & 4
ALT 5 & 1 LOW PRESSURE SWITCH TRIP
ALT 5 & 2 HIGH PRESSURE SWITCH TRIP
ALT 6 COMPRESSOR VC/VH TRIP
BOARD FAILURE
CONSTANT LIGHT NO PAUSE / NO FLASH
Fig. 1—Wiring Diagram–024, 036, 048
Printed in U.S.A.
Two-Speed Heat Pump with Puron®
DUAL CAPACITY
L1
CONNECTION DIAGRAM
208 / 230 - 1 - 60
L2 YEL
POWER SUPPLY
EQUIP GND
RVS
RED
ORN
ORN
BLU
BLK
PL1 1 2 3 4 5 1 2
HI LO
HP/AC C SEV RVS C
LPS
PL3
FORCED
DEFROST
HPS
PL4
DEFROST
TIME (MIN) OAT
PL5
OCT
O
COMM STATUS
Y 2
VC
Y 1
VH
W
1
A B C D
ODF
C
L 2
R
CCH
TO INDOOR UNIT
COMPONENT ARRANGEMENT
SYSTEM COMMUNICATION
UNITS 036, 048
COMPRESSOR
HIGH PRESSURE SWITCH
CH
LOW PRESSURE SWITCH
THERMISTOR (OUTDOOR AIR) DUAL CAPACI TY
CONTROL
THERMISTOR COIL
COMP
OUTDOOR FAN MOTOR
CAP
REVERSING VALVE SOLEN OID
SYSTEM FUNCTION LIGHT
UNIT OPERATION/SEE UNIT INSTALLATION INSTRUCTIONS FOR DETAILS
VAPOR PRESSURE SWITCH
1 MINUTE TIME DELAY - WHEN CHANGING FROM LOW TO HIGH, OR HIGH TO LOW, THERE IS A 1 MINUTE TIME DELAY. NOTE,
DURING CAPACI TY CHANGE DELAY THE OUTDOOR FAN WILL REMAIN RUNNING.
DEFINITION CRANKCASE HEATER - OPERATES DURING OFF CYCLE.
DEFROST TIME SELECTION - (SHOWN AS DT ON BOARD) THE DEFROST INTERVAL TIME CAN BE FIELD-SELECTED, DEPENDENT
UPON LOCAL/GEOGRAPHIC REQUIREMENTS. IT IS FACTORY SET AT 90 MINUTES AND CAN BE CHANGED TO
EITHER 30, 60 OR 120 MINUTES.
DEFROST - DEFROST WILL ONL Y BE PERFORMED AT OUTDOOR TEMERATURES LESS THAN 50°F . DEFROST WILL INITIATE WHEN
TIME SELECTED HAS ELAPSED AND THE COIL TEMPERATURE IS LESS THAN 30°F . (±2°) AND WILL TERMINATE AT
80°F. (± 5°). UPON DEFROST TERMINATION THE OUTDOOR FAN WILL DELAY 20 SECONDS BEFORE STARTI NG.
FIELD INITIATED FORCED DEFROST - (SHOWN AS FORCED DEFROST ON BOARD) BY PLACING A JUMPER ACROSS THE FORCED
DEFROST TERMINALS FOR 5 SECONDS, OR LONGER, AND THEN REMOVING THE JUMPER, THE UNIT WILL INITIATE A
DEFROST CYCLE REGARDLESS OF COIL TEMPERATURE. THE DEFROST CYCLE WILL TERMINATE AT 80°F (± 5°).
IF COIL TEMPERATURE IS ABOVE 30° OR OUTDOOR AMBIENT TEMPERATURE IS ABOVE 50°F , DEFROST MODE WILL
TERMINATE AFTER 30 SECONDS OF ACTIVE MODE.
Form 38YDB-3W
Sizes 024–060
BLK
BLK
BLK
RED
CH
C L
11 11
23
23 21 21
YEL
BRN
BLK
R
BLU
BRN
BRN S
PL2
BRN
LPS
1 START
YEL/PNK CAP
2
C
3 COMP
YEL/PNK
CAP
HPS
BRN
BLU/PNK H
1
2 YEL
BLU/PNK
5 1
OAT
-t°
BLU
BLK
1
2
2 BLU
BLK
OCT
-t° START BRN
BRN
4
RELAY
5
BRN
BRN YEL
YEL
BLU
VPS FAN CAP
BLK BLK BRN
YEL
RED
CCH
COMPONENT ARRANGEMENT
UNIT 024 ONLY
START
CL
CH
RELAY
CL
DUAL
START COMP
CAPACI TY
FAN
CAP
CAP
CONTROL
CAP
326367-101 REV. A
Pg 1 8-02 Replaces: 38YDB-2W
38YDB
NOTE #11
COMP
C
OFM
BLK
RED
FAN
CAP
START
RELAY
START
CAP
A00219