Carrier 38MVC, 38MVQ, 40MVC, 40MVQ REFRIGERATION CYCLE DIAGRAM

REFRIGERATION CYCLE DIAGRAM

CAPILLARY TUBE

HEAT

EXCHANGER

(CONDENSER)

HEAT

EXCHANGER

(EVAPORATOR)

FIELD

PIPING

COMPRESSOR

FLARE CONNECTION

SERVICE VALVE

SERVICE VALVE W/GUAGE PORT

TWO PHASE LIQUID LINE

SUCTION LINE

FIELD

PIPING

FLARE CONNECTION

A08104

Fig. 13 – Cooling

CAPILLARY TUBE

HEAT

EXCHANGER

(CONDENSER)

HEAT

EXCHANGER

(EVAPORATOR)

SERVICE VALVE

LIQUID HTG LIQUID

TWO PHASE

CHECK VALVE

(HEATING MODEL ONLY)

REVERSING

VALVE

(HEAT PUMP ONLY)

COOLING

HEATING

COMPRESSOR

SUCTION

DISCHARGE

SUCTION

ACCUMULATOR

SERVICE VALVE

W/ GUAGE PORT

FIELD

PIPING

INDOOR UNIT OUTDOOR UNIT

FLARE CONNECTION

A08105

Fig. 14 – Heat Pumps

38/40MVC, MVQ

Contents

Main Service Manual SAFETY CONSIDERATIONS !WARNING INTRODUCTION MODEL NUMBER NOMENCLATURE OUTDOOR UNIT INDOOR UNIT SERIAL NUMBER NOMENCLATURE STANDARD FEATURES AND ACCESSORIES INDOOR UNITS 38/40MVC, MVQ OUTDOOR UNITS LOW AMBIENT KIT CRANKCASE HEATER SPECIFICATIONS -- COOLING ONLY UNITS 38/40MVC, MVQ SPECIFICATIONS -- HEAT PUMP UNITS DIMENSIONS -- INDOOR DIMENSIONS -- OUTDOOR H W L1 CLEARANCES -- INDOOR CLEARANCES -- OUTDOOR SYSTEM OPERATING ENVELOPE 38/40MVC, MVQ 53MVC/MVQ System Operating Envelope Chart Cooling Continuous Operation Heating Continuous Operation CONNECTION DIAGRAMS Page Page Page Page Page Page Page REFRIGERATION CYCLE DIAGRAM REFRIGERANT LINES SYSTEM EVACUATION AND CHARGING CAUTION t ! SYSTEM VACUUM AND CHARGE Outdoor Unit Indoor Uni CONTROL SYSTEM SYSTEM SAFETIES 3MINUTETIMEDELAY COMPRESSOR OVERCURRENT PROTECTION S S S S SEQUENCE OF OPERATION Interface MODES OF OPERATION Page Page TROUBLESHOOTING DIAGNOSTIC HIERARCHY CHART 1 -- INDOOR FAN SPEED OUT OF CONTROL CHART 2 -- TEMPERATURE SENSOR CHART 3 -- COMPRESSOR OVERCURRENT PROTECTION CHART 4 -- INDOOR UNIT COMMUNICATION ERROR SIZE 9K AND 12K CHART 5 -- OUTDOOR UNIT PROTECTS * CHART 6 -- INDOOR UNIT COMMUNICATION ERROR SIZE 18K AND 24K CHART 7 -- UNIT NOT RUNNING, NO DIAGNOSTIC CODE CHART 8 -- UNIT NOT RUNNING OPTIMALLY CHART 9 -- UNIT NOT RUNNING OPTIMALLY (HP IN HEATING)* CHART 10 -- COMPRESSOR CHART 11 -- OUTDOOR MOTOR CHART 12 -- REVERSING VALVE CHART 13 -- RECEIVER BOARD APPENDIX 38/40MVC, MVQ A 1 -- 5 3 M V C 0 0 9 -- -- -- 1 / 5 3 M V C 0 1 2 -- -- -- 1 A 2 -- 5 3 M V Q 0 0 9 -- -- -- 1 / 5 3 M V Q 0 1 2 -- -- -- 1 A 3 -- 5 3 M V C 0 1 2 -- -- -- 3 38/40MVC, MVQ A 4 -- 5 3 M V Q 0 1 2 -- -- -- 3 A 5 -- 5 3 M V C 0 1 8 -- -- -- 3 A6 -- Characteristics of Temperature Sensor A7 -- Fuse Chart A8 -- Indoor Unit Diagnostic Guides 9K & 12K Units 18K & 24K Units Fig. 34 LED Display Panel