![background image](http://html1.mh-extra.com/html/daikin/dbg-series/dbg-series_service-instructions-manual_3242735024.webp)
SERVICING
24
Table of Contents
HIGH VOLTAGE!
Disconnect ALL power before servicing or installing this unit. Multiple power sources
may be present. Failure to do so may cause property damage, personal injury or death.
S-1
Checking Voltage ...........................................25
S-2
Checking Wiring ............................................26
S-3
Checking Thermostat, Wiring & Anticipator ...26
S-3A Thermostat & Wiring ......................................26
S-3B Cooling Anticipator .........................................26
S-3C Heating Anticipator ........................................26
S-7
Checking Contactor and/or Relays ................27
S-8
Checking Contactor Contacts ........................27
S-9
Checking Fan Relay Contact .........................27
S-11 Checking Loss of Charge Protection .............29
S-12 Checking High Pressure Control ...................29
S-13 Checking Low Pressure Control ....................29
S-15 Checking Capacitor .......................................29
S-15A Resistance Check ..........................................30
S-15B Capacitance Check .......................................31
S-16 Checking Motors ............................................31
S-16A Checking Fan Motor Windings
(PSC Motors) .................................................31
S-17 Checking Compressor Windings ...................31
S-17A Resistance Test .............................................32
S-17B Ground Test ...................................................32
S-17D Operation Test ...............................................33
S-18 Testing Crankcase Heater (Optional Item) ....33
S-50 Checking Heater Limit Control(s) ..................33
S-100 Refrigeration Repair Practice ........................34
S-101 Leak Testing ..................................................34
S-102 Evacuation .....................................................34
S-103 Charging ........................................................35
S-104 Checking Compressor Efficiency
...................36
S-106 Overfeeding ...................................................36
S-109 Checking Subcooling .....................................37
S-112 Checking Restricted Liquid Line ....................37
S-113 Refrigerant Overcharge .................................37
S-114 Non-condensables .........................................37
S-115 Compressor Burnout .....................................40
S-200 Checking Extedrnal Static Pressure ..............40
S-201 Checking Temperature Rise ..........................40
S-205 Checking Belt Tension ...................................41
S-206
Indoor Fan Rotation Check ...........................41
S-207
Motor Sheave Adjustment ............................42
S-300 Testing Primary Limit .....................................42
S-301 Testing Auxiliary Limit ....................................43
S-302 Checking Flame Rollout Switch .....................43
S-303 Testing Inducer Motor ....................................44
S-304 Testing Gas Valve ..........................................44
S-305 Checking Main Burners .................................45
S-306 Checking Orifices
..........................................45
S-307 Checking Gas Pressure .................................46
S-308 Checking For Delayed Ignition ......................46
S-309 Checking for Flashback .................................47
S-310 Checking Pressure Control ............................47
S-311 High Altitude Application ................................47
S-313 Testing Ignition Control Module .....................48
S-314 Checking Flame Sensor ................................50
Summary of Contents for DBG Series
Page 51: ...51 ACCESSORIES GAS ELECTRIC...
Page 52: ...ACCESSORIES 52 GAS ELECTRIC...
Page 53: ...53 ACCESSORIES...
Page 54: ...ACCESSORIES 54...
Page 95: ...95 DBC COMMERCIAL 15 25 Ton Packaged Air Conditioner Unit WIRING DIAGRAMS...
Page 100: ...100 DBG COMMERCIAL 15 25 Ton Packaged Gas Electric Unit WIRING DIAGRAMS...