Service Instructions
This manual is to be used by qualified, professionally trained HVAC technicians only. Daikin does
not assume any responsibility for property damage or personal injury due to improper service
procedures or services performed by an unqualified person.
RSD6200007r24
May 2023
ONLY PERSONNEL THAT HAVE BEEN TRAINED TO INSTALL, ADJUST,
SERVICE, MAINTENANCE OR REPAIR (HEREINAFTER, “SERVICE”)
THE EQUIPMENT SPECIFIED IN THIS MANUAL SHOULD SERVICE THE
EQUIPMENT.
THIS EQUIPMENT IS NOT INTENDED FOR USE BY PERSONS (INCLUDING
CHILDREN) WITH REDUCED PHYSICAL, SENSORY OR MENTAL CAPABILITIES,
OR LACK OF EXPERIENCE AND KNOWLEDGE, UNLESS THEY HAVE BEEN
GIVEN SUPERVISION OR INSTRUCTION CONCERNING USE OF THE
APPLIANCE BY A PERSON RESPONSIBLE FOR THEIR SAFETY.
CHILDREN SHOULD BE SUPERVISED TO ENSURE THAT THEY DO NOT PLAY
WITH THE EQUIPMENT.
THE MANUFACTURER WILL NOT BE RESPONSIBLE FOR ANY INJURY OR
PROPERTY DAMAGE ARISING FROM IMPROPER SUPERVISION, SERVICE
OR SERVICE PROCEDURES. IF YOU SERVICE THIS UNIT, YOU ASSUME
RESPONSIBILITY FOR ANY INJURY OR PROPERTY DAMAGE WHICH MAY
RESULT. IN ADDITION, IN JURISDICTIONS THAT REQUIRE ONE OR MORE
LICENSES TO SERVICE THE EQUIPMENT SPECIFIED IN THIS
MANUAL, ONLY LICENSED PERSONNEL SHOULD SERVICE THE EQUIPMENT.
IMPROPER SUPERVISION, INSTALLATION, ADJUSTMENT, SERVICING,
MAINTENANCE OR REPAIR OF THE EQUIPMENT SPECIFIED IN THIS
MANUAL, OR ATTEMPTING TO INSTALL, ADJUST, SERVICE OR REPAIR THE
EQUIPMENT SPECIFIED IN THIS MANUAL WITHOUT PROPER SUPERVISION
OR TRAINING MAY RESULT IN PRODUCT DAMAGE, PROPERTY DAMAGE,
PERSONAL INJURY OR DEATH.
WARNING
WARNING
DO NOT BYPASS SAFETY DEVICES.
TABLE OF CONTENTS
Important Information ................................................................2
Product Identification ..................................................................4
Accessories ................................................................................21
Product Design ..........................................................................28
System Operation ......................................................................31
Troubleshooting Chart ...............................................................35
Servicing Table of Contents .......................................................36
Servicing ....................................................................................37
Wiring Diagrams ......................................................................117
Copyright © 2021-2023
ComfortNet™
DX7TC, DX16TC & DX18TC Condensing Units,
DZ7TC,
DZ16TC & DZ18TC Split System Heat Pumps
with R-410A Refrigerant
Blowers, Coils, & Accessories
