SERVICING
16
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 .......................................... 17
S-2
Checking Wiring ............................................ 18
S-3
Checking Thermostat, Wiring & Anticipator .. 18
S-3A
Thermostat & Wiring ..................................... 18
S-3B
Cooling Anticipator ........................................ 18
S-4
Checking Tranformer & Control Circuit .......... 18
S-7
Checking Contactor and/or Relays ................ 19
S-8
Checking Contactor Contacts ....................... 19
S-9
Checking Fan Relay Contact ........................ 19
S-11
Checking Loss of Charge Protection ............. 21
S-12
Checking High Pressure Control ................... 21
S-13
Checking Low Pressure Control .................... 21
S-15
Checking Capacitor ....................................... 21
S-15A Resistance Check ......................................... 22
S-15B Capacitance Check ....................................... 22
S-16
Checking Motors ........................................... 23
S-16A Checking Fan Motor Windings
(PSC Motors) ................................................ 23
S-17
Checking Compressor Windings ................... 23
S-17A Resistance Test ............................................ 23
S-17B Ground Test .................................................. 24
S-17D Operation Test .............................................. 24
S-18
Testing Crankcase Heater (Optional Item) .... 24
S-50
Checking Heater Limit Control(s) .................. 25
S-100
Refrigeration Repair Practice ......................... 25
S-101
Leak Testing ................................................. 25
S-102
Evacuation .................................................... 26
S-103
Charging ........................................................ 26
S-104
Checking Compressor Efficiency .................. 27
S-106
Overfeeding ................................................... 27
S-109
Checking Subcooling .................................... 28
S-110
Checking Expansion Valve ............................ 28
S-112
Checking Restricted Liquid Line .................... 28
S-113
Refrigerant Overcharge .................................. 28
S-114
Non-condensables ........................................ 28
S-115
Compressor Burnout ..................................... 31
S-200
Checking External Static Pressure ............... 31
S-201
Checking Temperature Rise .......................... 31
S-205
Checking Belt Tension .................................. 31
S-206
Indoor Fan Rotation Check ............................ 32
S-207
Motor Sheave Adjustment ............................ 32
Содержание DCH048 SERIES
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