Daikin DZ20VC - Servicing Table of Contents

19
HIGH VOLTAGE!
Disconnect ALL power before servicing or installing. Multiple power sources may be present. Failure to
do so may cause property damage, personal injury or death.
TABLE OF CONTENTS
S-1 CHECKING VOLTAGE ..................................................... 20
S-2 CHECKING WIRING ...................................................... 20
S-3 CHECKING THERMOSTAT AND WIRING ........................ 20
S-3A THERMOSTAT AND WIRING .......................................... 20
S-3E DAIKIN COMMUNICATING THERMOSTAT ..................... 21
S-4 CHECKING TRANSFORMER AND CONTROL CIRCUIT........21
S-12 CHECKING HIGH PRESSURE SWITCH ............................ 22
S-13 CHECKING INDOOR AND
OUTDOOR HI/LOW PRESSURE SENSOR ....................... 22
S-17 CHECKING COMPRESSOR ............................................ 22
S-17A RESISTANCE TEST .......................................................... 23
S-17B GROUND TEST .............................................................. 23
S-26 TESTING TEMPERATURE SENSORS
AND EEV COIL RESISTANCE ........................................ 23
S-40A MBVC**00AA-1 HEATER CONTROL .............................. 24
S-40B DV**PEC HEATER CONTROL ......................................... 25
S-50 CHECKING HEATER LIMIT CONTROL(S) ......................... 26
S-52 CHECKING HEATER ELEMENTS ...................................... 26
S-60 ELECTRIC HEATER (OPTIONAL ITEM) ............................ 26
S-61A CHECKING HEATER LIMIT CONTROL(S) ......................... 27
S-61B CHECKING HEATER FUSE LINK
(OPTIONAL ELECTRIC HEATERS) ................................... 27
S-100 REFRIGERATION REPAIR PRACTICE ............................... 28
S-101 LEAK TESTING (NITROGEN OR NITROGEN-TRACED) ..... 28
S-102 EVACUATION ................................................................ 28
S-103 CHARGING .................................................................... 29
SERVICING TABLE OF CONTENTS
S-104 CHECKING COMPRESSOR EFFICIENCY ......................... 30
S-105B THERMOSTATIC EXPANSION VALVE ............................... 30
S-106 OVERFEEDING .............................................................. 30
S-107 UNDERFEEDING ........................................................... 30
S-108 SUPERHEAT .................................................................. 30
S-109 CHECKING SUBCOOLING .............................................. 31
S-110 CHECKING THERMOSTATIC
EXPANSION VALVE OPERATION .................................... 32
S-114 NON-CONDENSABLES ................................................... 32
S-115 COMPRESSOR BURNOUT ............................................. 33
S-120 REFRIGERANT PIPING .................................................. 33
S-202 DUCT STATIC PRESSURES
AND/OR STATIC PRESSURE DROP ACROSS COILS ......... 37
S-203 AIR HANDLER EXTERNAL STATIC ................................... 37
S-204 COIL STATIC PRESSURE DROP ....................................... 38
HE PECIFICATION OF OR EARLIER MODELS ARE DIFFERENT FROM THIS SPECIFICATION OR DETAILS SEE THE SERVICE
MANUAL THAT MATCHES THE MAJOR REVISION OF MODEL NAME
T S DZ20VC0601B* . F ,
.
NOTICE