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DCH048 SERIES
Daikin DCH048 SERIES User Manual
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40
ACCESSORIES WIRING DIAGRAMS
HIGH VOL
T
A
GE!
DISCONNECT ALL POWER BEFORE
SERVICING OR INS
T
ALLIN
G
THIS
UNIT
. M
UL
TIPL
E POWER SOUR
CES MA
Y BE P
RESENT
. F
AI
LURE TO
DO SO
MA
Y CAUS
E PROP
ERTY DAMAGE,
PERSONAL INJURY OR DEA
TH
.
Wiring is subject to change. Always refer to the wiring diagram on the unit for the most up-to-date wiring.
85
87
Table of Contents
Table of Contents
2
Important Information
3
Product Design
7
System Operation
11
System Operation
16
Scheduled Maintenance
17
Servicing
19
Servicing
20
Checking Voltage
20
Checking Wiring
21
Checking Thermostat, Wiring & Anticipator
21
S-3A Thermostat & Wiring
21
S-3B Cooling Anticipator
21
Checking Transformer & Control Circuit
21
Checking Contactor And/Or Relays
22
Checking Contactor Contacts
22
Checking Fan Relay Contact
23
Checking Loss of Charge Protection
24
Checking High Pressure Control
24
Checking Low Pressure Control
25
Checking Capacitor
25
S-15A Resistance Check
25
S-15B Capacitance Check
26
Checking Motors
26
S-16A Checking Fan & Blower Motor
26
Windings (PSC Motors)
26
S-16D Checking EEM Motors
26
Checking Compressor Windings
27
S-17A Resistance Test
27
S-17B Ground Test
27
S-17D Operation Test
28
Testing Crankcase Heater (Optional Item)
28
S-18A Crankcase Heater Thermostat
29
Checking Reversing Valve & Solenoid
29
Testing Defrost Control
29
Testing Defrost Thermostat
29
Checking Heater Limit Control(S)
30
Refrigeration Repair Practice
30
Leak Testing
30
Evacuation
31
Charging
32
Overfeeding
33
Checking Superheat
33
S-104 Checking Compressor Efficiency
33
Fixed Orifice Restriction Devices
36
Checking Restricted Liquid Line
36
Non-Condensables
36
Compressor Burnout
36
Checking External Static Pressure
37
Checking Temperature Rise
38
Checking Belt Tension
38
Indoor Fan Rotation Check
39
Motor Sheave Adjustment
39
Servicing
39
Unit Wiring Diagrams
40
Section 3
65
Checking Voltage
66
Checking Wiring
67
S-3B Cooling Anticipator
67
Checking Contactor And/Or Relays
68
Checking Contactor Contacts
68
Checking Capacitor
70
Checking High Pressure Control
70
Checking Low Pressure Control
70
S-15A Resistance Check
71
S-15B Capacitance Check
71
Checking Compressor Windings
72
Checking Motors
72
S-16A Checking Fan & Blower Motor
72
S-17A Resistance Test
72
Windings (PSC Motors)
72
S-17B Ground Test
73
S-17D Operation Test
73
Testing Crankcase Heater (Optional Item)
73
Testing Defrost Control
74
Testing Defrost Thermostat
74
Checking Heater Elements
75
Checking Heater Limit Control(S)
75
Evacuation
76
Leak Testing
76
Refrigeration Repair Practice
76
Charging
77
Checking Compressor Efficiency
77
Checking Superheat
78
Fixed Orifice Restriction Devices
78
Overfeeding
78
Checking Restricted Liquid Line
81
Compressor Burnout
81
Non-Condensables
81
Checking Temperature Rise
82
Checking Belt Tension
83
Indoor Fan Rotation Check
84
Section 4
111
Checking Voltage
112
Checking Wiring
113
S-3B Cooling Anticipator
113
Checking Contactor And/Or Relays
114
Checking Contactor Contacts
114
Checking Fan Relay Contact
114
Checking Capacitor
116
Checking High Pressure Control
116
Checking Low Pressure Control
116
S-15A Resistance Check
117
S-15B Capacitance Check
117
(PSC Motors)
118
Checking Compressor Windings
118
Checking Motors
118
S-16A Checking Fan Motor Windings
118
S-17A Resistance Test
118
S-17B Ground Test
119
S-17D Operation Test
119
Testing Crankcase Heater (Optional Item)
119
Checking Heater Limit Control(S)
120
Leak Testing
120
Refrigeration Repair Practice
120
Charging
121
Evacuation
121
Checking Compressor Efficiency
122
Overfeeding
122
Checking Expansion Valve
123
Checking Restricted Liquid Line
123
Checking Subcooling
123
Non-Condensables
123
Checking Belt Tension
126
Checking External Static Pressure
126
Compressor Burnout
126
Indoor Fan Rotation Check
127
Motor Sheave Adjustment
127
5
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Daikin DCH048 SERIES Specifications
General
Brand
Daikin
Model
DCH048 SERIES
Category
Heat Pump
Language
English
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