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York SUNLINE DCE Series - User Manual

York SUNLINE DCE Series
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INSTALLATION
MANUAL
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
SUNLINE™
GAS/ELECTRIC SINGLE PACKAGE
AIR CONDITIONERS
D(CE, CG) 036, 048, 060 & 072
D(HE, HG) 036, 048 & 060
290699-YIM-B-0607
CONTENTS
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . 5
INSPECTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
REFERENCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
RENEWAL PARTS . . . . . . . . . . . . . . . . . . . . . . . . . 6
APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
PRODUCT NOMENCLATURE . . . . . . . . . . . . . . . . 6
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
START-UP (COOLING) . . . . . . . . . . . . . . . . . . . . 45
START-UP (GAS HEAT). . . . . . . . . . . . . . . . . . . . 45
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . 48
SEE THE FOLLOWING PAGES FOR A COMPLETE TABLE OF CONTENTS.
NOTES, CAUTIONS AND WARNINGS
The installer should pay particular attention to the words:
NOTE, CAUTION, and WARNING. Notes
are intended to
clarify or make the installation easier. Cautions
are given to
prevent equipment damage. Warnings
are given to alert
installer that personal injury and/or equipment damage may
result if installation procedure is not handled properly.

Table of Contents

Questions and Answers

  • A
    Alexandra BergerNov 6, 2025
    What to do if the York SUNLINE DCE Air Conditioner compressor won't turn on?
    • C
      Christina CurtisNov 6, 2025
      If the compressor on your York Air Conditioner isn't starting when the blower motor is running and cooling is requested, several issues could be the cause. First, if installed, check the position of the economizer blades, as the economizer might be providing free cooling. Also, examine the compressor contactor (M1) for line voltage and ensure it's engaged. Check for any loose wiring between the contactor and the compressor. If the compressor housing is hot, it may be off due to inherent protection; allow it to cool down before testing again. Check for 24 volts at the M1 coil; if present but M1 isn't engaged, the contactor may need replacement. Also verify that 24 volts are present at the UCB terminal C1 and check for loose wiring between C1 and the compressor contactor. Check the UCB Y1 te...
  • S
    Stephanie HinesNov 22, 2025
    How to fix a York SUNLINE DCE blower motor that won't start?
    • I
      ilambertNov 22, 2025
      If the supply air blower motor in your York Air Conditioner isn't starting after a short delay when cooling is activated and the compressors are running, here's what you can check: First, make sure the thermostat fan switch is set to the 'ON' position. If the blower motor works in the 'ON' position but not in 'AUTO' after the compressor starts, check the room thermostat for contact between R and G in the 'AUTO' position during cooling calls. Verify that line voltage is reaching the contacts of the M2 contactor and that the contactor is engaged; also, inspect for loose wiring between the contactor and the blower motor. If the motor housing is hot, it might be off due to internal protection; allow it to cool down before retesting. Check for 24 volts at the M2 coil; if present but M2 isn't en...

Summary

SAFETY CONSIDERATIONS

INSTALLATION

INSTALLATION SAFETY INFORMATION

Critical safety precautions to follow before and during unit installation.

LIMITATIONS AND CODES

OPERATION

SAFETY CONTROLS

START-UP (COOLING)

PRESTART CHECK LIST

START-UP (GAS HEAT)

PRE-START CHECK LIST

TROUBLESHOOTING

COOLING TROUBLESHOOTING GUIDE

Diagnostic steps for cooling system issues.

GAS HEAT TROUBLESHOOTING GUIDE

Diagnostic procedures for gas heating system malfunctions.

UNIT CONTROL BOARD FLASH CODES

Interpreting error codes from the unit control board.

IGNITION CONTROL BOARD FLASH CODES

Interpreting error codes from the ignition control board.

York SUNLINE DCE Series Specifications

General IconGeneral
BrandYork
ModelSUNLINE DCE Series
CategoryAir Conditioner
LanguageEnglish

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