Daikin DCG Series Service Instructions Manual

Also see for DCC Series: Installation instructions Installation instructions Installation instructions Installation instructions Installation instructions

Contents

SERVICING44Table of ContentsHIGH VOLTAGE!Disconnect ALL power before servicing or installing this unit. Multiple power sourcesmay be present. Failure to do so may cause property damage, personal injury or death.S-1 Checking Voltage .......................................... 33S-2 Checking Wiring ............................................ 34S-3 Checking Thermostat, Wiring & Anticipator .. 34S-3A Thermostat & Wiring ..................................... 34S-3B Cooling Anticipator ........................................ 34S-3C Heating Anticipator ........................................ 34S-4 Checking Transformer & Control Circuit ....... 35S-7 Checking Contactor and/or Relays ................ 35S-8 Checking Contactor Contacts ....................... 35S-9 Checking Fan Relay Contact ........................ 36S-11 Checking Loss of Charge Protection ............. 37S-12 Checking High Pressure Control ................... 37S-13 Checking Low Pressure Control .................... 38S-15 Checking Capacitor ....................................... 38S-15A Resistance Check ......................................... 38S-15B Capacitance Check ....................................... 39S-16 Checking Motors ........................................... 39S-16A Checking Fan & Blower MotorWindings (PSC Motors) ............................... 39S-17 Checking Compressor Windings ................... 39S-17A Resistance Test ............................................ 39S-17B Ground Test .................................................. 40S-17D Operation Test .............................................. 40S-18 Testing Crankcase Heater (optional item) ..... 41S-18A Crankcase Heater Thermostat ...................... 41S-21 Checking Reversing Valve & Solenoid ........... 41S-24 Testing Defrost Control .................................. 41S-25 Testing Defrost Thermostat ........................... 42S-50 Checking Heater Limit Control(s) .................. 42S-52 Checking Heater Elements ........................... 42S-100 Refrigeration Repair Practice ......................... 42S-101 Leak Testing ................................................. 43S-102 Evacuation .................................................... 43S-103 Charging ........................................................ 44S-104 Checking Compressor Efficiency .................. 45S-106 Overfeeding ................................................... 45S-108 Checking Superheat ...................................... 45S-109 Checking Subcooling .................................... 46S-110 Checking Expansion Valve Operation ........... 46S-111 Fixed Orifice Restriction Devices .................. 46S-112 Checking Restricted Liquid Line .................... 46S-113 Refrigerant Overcharge .................................. 49S-114 Non-condensables ........................................ 49S-115 Compressor Burnout ..................................... 49S-200 Checking External Static Pressure ............... 50S-201 Checking Temperature Rise .......................... 50S-205 Checking Belt Tension .................................. 50S-206 Indoor Fan Rotation Check ............................ 51S-207 Variable Sheave Adjustment ......................... 51S-300 Testing Primary Limit .................................... 52S-301 Testing Auxiliary Limit ................................... 53S-302 Checking Flame Rollout Switch .................... 53S-303 Testing Inducer Motor .................................... 53S-304 Testing Gas Valve ......................................... 54S-305 Checking Main Burners ................................. 55S-306 Checking Orifices .......................................... 55S-307 Checking Gas Pressure ................................ 56S-308 Checking For Delayed Ignition ...................... 57S-309 Checking for Flashback ................................. 57S-310 Checking Pressure Control ........................... 57S-311 High Altitude Application ............................... 58S-313 Testing Ignition Control Module ..................... 58S-314 Checking Flame Sensor ................................ 60