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Carrier 040-420 LEGEND D P T - Discharge Pressure Transducer, Oil Pressure Transducer

Models: 040-420

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LEGEND

MUFFLERS

COMPRESSORS

											FILTER
I I			c								DRIER
I I


							CIRCUIT B
							CIRCUIT B
r							CIRCUIT A
							CIRCUIT A

LEGEND

D P T - Discharge Pressure Transducer

- Oil Pressure Transducer

:ppTT - Suction Pressure Transducer

T - Thermistor Number

Fig. 13 - Thermistor and Pressure Transducer Locations

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Carrier 040-420 LEGEND D P T - Discharge Pressure Transducer, Oil Pressure Transducer, ppTT - Suction Pressure Transducer

Contents

ACCESSORY UNLOADER INSTALLATION CONTENTSSAFETY CONSIDERATIONS 040-420MAJOR SYSTEM COMPONENTS GENERALTable 1 - Unit Sizes and Modular Combinations DsroiLv Compressor Protection Control Module CPCS Table 2 - LOCAL/ENABLE-STOP-CCNSwitch Positions and Operation Table 3 - Thermistor and Transducer LocationsTable 4A - Capacity OPERATION DATAControl Steps, Table 4A - Capacity Control Steps, 040-070cant 060A\~**HzTable 4A - Capacity Control Steps, 040-070cant “‘“G Hzylf,t oy&ya08Aqy ,y A;.$Aiti A4l&pi’&Page A;;:;H Wtf2Z$’ AlttBitt BittA’tt A;;;#Amrox $-t&Z3“A:tkA2’i3BI~ ~,;~~J“B’p Page hwrox Bitt AlPtlBl’“Att l”l’ B1 tty&t3g A2.pBitt ~l*;;# B;$+A&t$$V ‘-J-&W~’ BB’!J~i~~~~ CKEL 86p Hz Page Table 4D - Capacity Control Steps, 225, 250,280 hwroxJG SEQUENCE UNITLOAC 4G SEQUENCEf& Hz Table 5 - Condenser Fan Sequence Table 5 - Condenser Fan Sequence cant Fig. 3 - Keypad and Display Module Keypad and Display Module Also Called HSIOTable 6 - Keypad and Display Module Usage Table 8 - Accessing Functions and Subfunctions Table 7 - Functions and SubfunctionsTable 9 - Keypad Directory STATUS Table 9 - Keypad Directory cant STATUS cant SUBFUNCTION 10 OUTPUTS TESTTable 9 - Keypad Directory cant STATUS cant DISPLAYTable 9 - Keypad Directory cant TEST cant SCHEDULESERVICE Table 9 - Keypad Directory SCHEDULE cantat Clt cl Table 9 - Keypad Directory cant SERVICE cordCltt ct lTable 9 - Keypad Directory cant SET POINTp-jq Example 1 -Reading Alarm CodesTable 10 - Operationat and Mode Display Codes Example 2 - Reading Current Operating Modes Example 4 - Reading and Changing Example 3 -Using Test FunctionChilled Water Set Point Fig. 4 - Cooling Return Water Reset Example 5 -Using Return Water Temperature Resetf73c= -- / Fig. 5 - Cooling External Temperature Reset Example 6 - Changing Reset Type8- 16 ? Table 11 -Service Functions _ ‘-+pFig. 7 - 4-20mA Cooling Temperature Reset Fig. 8 - 4-20mA Example 8 - Setting Time of Day and Day of WeekDemand Limiting Table 12 - Factory Configuration Keystrokes Table 13 - Adjustable Field ConfigurationsExample 9 - Using the Schedule Function Example 9 continued next pageExample 10 - Holiday Schedule Function Example 9 - Using the Schedule Function cant‘EYo Fig. 9 - Sample Time ScheduleTypical Stoppage Faults and Reset Types TROUBLESHOOTINGComplete Unit Stoppage - Complete unit stop Table 14 - Alarm Codes Possible causes of failure Code 30 Reset input failure 4 to 20 mA CPCS Fig. IOA - 24-VSafety Circuit Wiringi2G7 ’ Sl32MP TNANZ24VAC IlEO2Plug LEGENDLow Voltage TransformerC G F Fig. 12 - EXV Cable Connections to 1 Electronic Expansion ValveFig. 11 - Electronil c Expansion Valve EXV EXV Driver Module, DSIO EXVCircuit A -Thermistor T7, Suction Pressure Trans ppTT - Suction Pressure Transducer LEGEND D P T - Discharge Pressure TransducerOil Pressure Transducer T - Thermistor NumberFig. 15 - Thermistors Fig. 14 - Thermistor LocationsCircuits A and B, Lead Compressor Only WATER-SIDETEMPERATURE SENSOR Tl, T2, -ALL UNITSFig. 16 - Pressure Transducer TEMP:;fTURE Page Page Control Modules Selector Switch LocationsFig. 18 - Module Address %o-693 Fig. 19 - Sensor Bus Wiring Communications1 $i 1 !;i fL.w--6%2COMM Fig. 22 - 4 In/4 Out Module SIOTroubleshooting TableTable 18 - Standard and Accessory Unloaders ACCESSORY UNLOADER INSTALLATIONInstallation 13 6 y Fig. 23 - Accessory Unloader Control Wiring 69080-110SO/SO Hz and 130 60 Hz ‘. \3.Wire in the solenoid valves 4368 WIRINGFig. 26B - Demand Limit - Two External Switch k367Fig. 30 - Remote Reset from 4-20mA Signal Fig. 27 - Demand Limit - 4-20mA SignalExternally Powered Fig. 28 - Demand Limit - 4-20mA Signalu2 TB-5 InstallationFig. 35 -Remote Alarm ~,. $$scribed in m H and r;lFl sections on page Page Copyright 1994 Carrier Corporation