Carrier High Wall Duct Free Split System 38MVC Service Manual
Comfort series high-wall duct-free split system sizes 009 - 024
Hide thumbs
Also See for High Wall Duct Free Split System 38MVC:
- Product data (35 pages) ,
- Installation instructions manual (14 pages) ,
- Owner's manual (11 pages)
Table of Contents
Advertisement
38MVC/40MVC
38MVQ/40MVQ
Comfortt Series High---Wall Duct---Free Split System
Sizes 009 --- 024
TABLE OF CONTENTS
SAFETY CONSIDERATIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
WIRING DIAGRAMS
. . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Manual
PAGE
. . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . .
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . .
10 - - 16
. . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .
. . . .
20 - - 21
. . . . . . . . . . . . . . . . . . . . . . . .
22 - - 24
25 - - 37
38 - - 43
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
1
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
2
damage. Consult a qualified installer, service agency, or your
3
distributor or branch for information or assistance. The qualified
installer or agency must use factory- -authorized kits or accessories
4
when modifying this product. Refer to the individual instructions
5
packaged with the kits or accessories when installing.
5
Follow all safety codes. Wear safety glasses, protective clothing,
6
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions
7
thoroughly and follow all warnings or cautions included in
7
literature and attached to the unit. Consult local building codes and
National Electrical Code (NEC) for special requirements.
8
9
Recognize safety information. This is the safety- -alert symbol
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
17
Understand these signal words: DANGER, WARNING, and
18
CAUTION. These words are used with the safety- -alert symbol.
19
DANGER identifies the most serious hazards which will result in
severe personal injury or death.
20
which could result in personal injury or death. CAUTION is used
20
to identify unsafe practices which may result in minor personal
injury or product and property damage. NOTE is used to highlight
20
suggestions which will result in enhanced installation, reliability, or
operation.
21
!
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than 1 disconnect switch. Lock out and
tag switch with a suitable warning label.
INTRODUCTION
Section 1 of this Service Manual provides the necessary
information to service, repair, and maintain the EEZ family of
Puron air conditioners and heat pumps. Section 2 of this manual is
an appendix with data required to perform troubleshooting. Use
the Table of Contents to locate a desired topic.
WARNING signifies hazards
WARNING
! !
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Carrier High Wall Duct Free Split System 38MVC
Summary of Contents for Carrier High Wall Duct Free Split System 38MVC
-
Page 1: Table Of Contents
38MVC/40MVC 38MVQ/40MVQ Comfortt Series High---Wall Duct---Free Split System Sizes 009 --- 024 TABLE OF CONTENTS SAFETY CONSIDERATIONS ......STANDARD FEATURES AND ACCESSORIES SPECIFICATIONS - - COOLING ONLY SPECIFICATIONS - - HEAT PUMP UNITS... -
Page 2: Model Number Nomenclature
MODEL NUMBER NOMENCLATURE Fan Coil Unit Unit Type MVC --- Cooling Only MVQ --- Heat Pump Air ---Cooled Condenser Unit Type MVC --- Cooling Only MVQ --- Heat Pump Week of Manufacture Year of Manufacture INDOOR UNIT Nominal Capacity 009 --- 3/4 Ton 012 --- 1 Ton 018 --- 1 ---1/2 Ton 024 --- 2 Tons... -
Page 3: Standard Features And Accessories
STANDARD FEATURES AND ACCESSORIES Ease Of Installation Mounting Brackets Low Voltage Controls Comfort Features Microprocessor Controls Wireless Remote Control Automatic Air Sweep Air Direction Control Auto Restart Function Cold Blow Protection On Heat Pumps Turbo Mode On Sizes 9K and 12 K Auto Changeover On Heat Pumps Energy Saving Features Sleep Mode... -
Page 4: Specifications - - Cooling Only
SPECIFICATIONS - - COOLING ONLY UNITS System Model Number System Voltage Control Voltage Capacity (Btuh) SEER Refrigerant Type Design Pressure (PSIG) Metering Device Charge (lb) Type Model Oil Charge (POE --- oz) Capacitor Rated Current (RLA) Locked Rotor Amp (LRA) Rpm/CFM Diameter (in) .. -
Page 5: Specifications - - Heat Pump Units
SPECIFICATIONS - - HEAT PUMP UNITS System Model Number System Voltage Control Voltage Capacity (Btuh) SEER HSPF Refrigerant Type Design Pressure (PSIG) Metering Device Charge (lb) Type Model Oil Charge (POE --- oz) Capacitor Rated Current (RLA) Locked Rotor Amp (LRA) Rpm/CFM Diameter (in) .. -
Page 6: Service Valve Locations
DIMENSIONS - - INDOOR Model Size in. (mm) 32.09 (815) 35.67 (906) 49.21 (1250) 49.21 (1250) DIMENSIONS - - OUTDOOR Air Flow Model Size in. (mm) in. (mm) 30.71 (780) 21.26 (540) 29.92 (760) 23.23 (590) 33.07 (840) 27.36 (695) 31.16 (893) 33.86 (860) SERVICE VALVE LOCATIONS... -
Page 7: Clearances
CLEARANCES - - INDOOR (0.13m) min. CLEARANCES - - OUTDOOR UNIT 6" (0.15m) min. 5" (1.8m) Fig. 2 – Indoor unit clearance Air-outlet 9k and 12k in. (mm) 24 (610) 24 (610) 24 (610) 4 (102) 12 (305) Fig. 3 – Outdoor Unit Clearance 5"... -
Page 8: System Operating Envelope
SYSTEM OPERATING ENVELOPE 80ºF Heating Continuous Operation 5ºF Use low ambient control if the unit will operate in cooling at ambient conditions below 55_F (12.78_C). ELECTRICAL DATA OPERATING COMPRESSOR UNIT VOLTAGE* SIZE MAX/MIN VOLTS--- PH--- HZ 127/104 115 ---1 ---60 253/187 208/230 ---1 ---60 *Permissible limits of the voltage range at which the unit will operate satisfactorily... -
Page 9: Sizes
WIRING The main power is supplied to the outdoor unit. The field supplied connecting cable from the outdoor unit to indoor unit consists of four wires and provides the power for the indoor unit as well as the communication signal between the outdoor unit and indoor unit. Voltage drop on the connecting cable should be kept to a minimum. -
Page 17: Refrigeration Cycle Diagram
REFRIGERATION CYCLE DIAGRAM FLARE CONNECTION HEAT EXCHANGER (EVAPORATOR) FLARE CONNECTION INDOOR UNIT FLARE CONNECTION HEAT EXCHANGER (EVAPORATOR) FLARE CONNECTION FIELD PIPING TWO PHASE CAPILLARY TUBE SERVICE VALVE SERVICE VALVE W/GUAGE PORT SUCTION LINE FIELD PIPING Fig. 13 – Cooling CHECK VALVE (HEATING MODEL ONLY) LIQUID HTG CAPILLARY TUBE... -
Page 18: Refrigerant Lines
1/4” 3/8” Refrigerant Charge REFRIGERANT CHARGE lb. (kg) Unit Size Air Conditioner 2.3 (1.0) 2.9 (1.3) 4.4 (2.0) S Above charge is for piping runs up to 25 ft. (7.6 m). S For piping runs greater than 25 ft. (7.6 m), add 0.1 oz. of refrigerant per foot of extra piping up to the allowable length. -
Page 19: System Evacuation And Charging
SYSTEM EVACUATION AND CHARGING CAUTION UNIT DAMAGE HAZARD Failure to follow this caution may result in equipment damage or improper operation. Never use the system compressor as a vacuum pump. Refrigerant tubes and indoor coil should be evacuated using the recommended deep vacuum method of 500 microns. -
Page 20: Control System
CONTROL SYSTEM The 40MVC/MVQ unit is equipped with a microprocessor control to perform two functions: 1. Provide safety for the system 2. Control the system and provide optimum levels of comfort and efficiency The main microprocessor is located on the control board of the fan coil unit (outdoor units have a microprocessor too) with thermistors located in the fan coil air inlet and on the indoor coil. -
Page 21: Sequence Of Operation
Indoor Coil Freeze Protection The indoor coil can freeze due to any of the following: S Low system charge S Reduced indoor airflow S Restricted refrigerant flow S Low ambient temperature (outdoor) S Low load (indoor) In cooling mode, the thermistor located on a return bend of the indoor coil monitors the coil temperature continuously. -
Page 22: Modes Of Operation
MODES OF OPERATION The units have 5 main operating modes: 1. Fan Only 2. Cooling 3. Heating (heat pumps only) 4. Auto 5. Dehumidification (Dry) The units have 2 other modes (manual operation) that are operated in unique situations: 1. Auto Forced Mode (Emergency) 2. - Page 23 Auto Fan When the fan speed is set to Auto, the fan will run at either the medium or low speed based on the difference between the room temperature and the set point temperature as shown below: Low. Speed Room temp. down Med.
- Page 24 Dry (Dehumidification) Mode When more humidity control is desired, the Dry setting can be selected. Lower humidity is achieved when the microprocessor adjusts the indoor fan speed and compressor cycling by comparing the room temperature (T) and the set point temperature (TS). There are two different control algorithms: Size 9k and 12 k units: T = TS + 3.6 - - the compressor will run for 6 minutes and the...
-
Page 25: Troubleshooting
TROUBLESHOOTING This section provides the required flow charts to troubleshoot problems that may arise. NOTE: Information required in the diagnoses can be found either on the wiring diagrams or in the appendix. Required Tools: The following tools are needed when diagnosing the units: S Digital multimeter S Screw drivers (Phillips and straight head) S Needle- -nose pliers... - Page 26 CHART 1 - - INDOOR FAN SPEED OUT OF CONTROL Reset main power and Reset main power and restart system using remote. restart system using remote. Problem persists? Problem persists? Check motor connection. Check motor connection. Connection good? Connection good? Check IFM output and input on indoor board.
- Page 27 CHART 2 - - TEMPERATURE SENSOR Reset main power and restart system using remote. Problem persists? Check sensor connector at ID or OD board Connection good? Check input and output on indoor or outdoor board. Check sensor resistance. Appendix 6 Double check connection, for corrosion or high resistance.
- Page 28 CHART 3 - - COMPRESSOR OVERCURRENT PROTECTION Is unit running in outdoor Is unit running in outdoor ambient higher than ambient higher than 125 °F? 125 °F? Outdoor coil clean? Outdoor coil clean? Check connections from Check connections from OD board. Corrosion, or OD board.
- Page 29 CHART 4 - - INDOOR UNIT COMMUNICATION ERROR SIZE 9K AND 12K Check the wires and Check the wires and connections between connections between Indoor and outdoor units* Indoor and outdoor units* Reset main power and Reset main power and restart system using remote.
- Page 30 CHART 5 - - OUTDOOR UNIT PROTECTS Clean coil. Problem Clean coil. Problem Outdoor coil clean? Outdoor coil clean? persists? persists? Check outdoor unit Check outdoor unit Check sensors. Check sensors. board. Indicator light board. Indicator light Flow Chart #2 Flow Chart #2 flashing twice? flashing twice?
- Page 31 CHART 6 - - INDOOR UNIT COMMUNICATION ERROR SIZE 18K AND 24K Check the wires and Check the wires and Check the wires and connections between connections between connections between Indoor and outdoor units* Indoor and outdoor units* Indoor and outdoor units* Reset main power and Reset main power and Reset main power and...
- Page 32 CHART 7 - - UNIT NOT RUNNING, NO DIAGNOSTIC CODE Use auto forced function. Use auto forced function. Unit runs? Unit runs? Reset remote and restart Reset remote and restart the unit. Is unit running? the unit. Is unit running? Problem solved Problem solved Reset circuit breaker.
- Page 33 CHART 8 - - UNIT NOT RUNNING OPTIMALLY Clean coil. Problem Clean coil. Problem Outdoor coil clean? Outdoor coil clean? persists? persists? Clean filter. Problem Clean filter. Problem Indoor filter clean? Indoor filter clean? persists? persists? Check indoor fan Check indoor fan Replace indoor fan Replace indoor fan motor...
- Page 34 CHART 9 - - UNIT NOT RUNNING OPTIMALLY (HP IN HEATING)* Visually check outdoor Visually check outdoor Unit for ice blockage. ** Unit for ice blockage. ** Check defrost sensor. Ok? Check defrost sensor. Ok? Go to flow chart #2 Check application limits.
- Page 35 CHART 10 - - COMPRESSOR Trace connections from Trace connections from OD board. Connections OD board. Connections Check contactor.* Check contactor.* Contactor ok? Contactor ok? Check capacitor. Check capacitor. Capacitor ok? Capacitor ok? Check compressor Check compressor windings. Ok? windings. Ok? Compressor ok.
- Page 36 CHART 11 - - OUTDOOR MOTOR Visually confirm that fan Visually confirm that fan blades and outdoor coil blades and outdoor coil are not blocked. are not blocked. Trace connections from Trace connections from OD board. Connections OD board. Connections Check capacitor.
- Page 37 CHART 12 - - REVERSING VALVE Check RV connection on Check RV connection on outdoor board. Ok? outdoor board. Ok? Check RV output on outdoor Check RV output on outdoor board. Ok? board. Ok? Check RV solenoid. Ok? Check RV solenoid. Ok? Replace reversing valve.
-
Page 38: Appendix
DESCRIPTION Control Boards Input/Output tables for 53MVC009(12)- -- -- -1 Control Boards Input/Output tables for 53MVQ009(12)- -- -- -1 Control Boards Input/Output tables for 53MVC012- -- -- -3 Control Boards Input/Output tables for 53MVQ012- -- -- -3 Control Boards Input/Output tables for 53MVC018- -- -- -3 Temperature Sensor Values (Temperature vs. - Page 39 A1 - - 53MVC009- -- -- -1 / 53MVC012- -- -- -1 38MVC009--- --- ---1/38MVC012--- --- ---1 CONTROL BOARD CONNECTOR OUT: (Pin 1: Pulse 0 to 12 Volts DC) (Pin2: 35±2 Volts DC) (Pin 3: GND) (Pin 4: 13±4 Volts DC) all relative to Pin 3 OUT: Neutral Neutral OUT: L 115 Volts AC...
- Page 40 A3 - - 53MVC012- -- -- -3 CONNECTOR OUT: (Pin 1: Pulse 0 to 12 Volts DC) (Pin2: 35±2 Volts DC) (Pin 3: GND) (Pin 4: 13±4 Volts DC) all relative to Pin 3 OUT: L2 208/230 Volt AC L2 208/230 Volt AC OUT: L1 208/230 Volt AC CN10 L1 208/230 Volt AC...
- Page 41 A5 - - 53MVC018- -- -- -3 CONNECTOR IN: 14.5±5V Volts AC Pulse Signal 0 to 24 Volts DC (Relative to ground) L1 208/230 Volts AC L2 208/230 Volts AC OUT: 208/230 Volts AC OUT: 208/230 Volts AC CONNECTOR IN: 11.0±3 Volts AC (Pin 1 to Pin2 ); OUT: IFM Capacitor Terminal 1 OUT: IFM Capacitor Terminal 2 OUT: 208/230 Volts AC...
- Page 42 A6 - - Characteristics of Temperature Sensor Temp. ˚F/˚C Resistance KΩ 14/--- 10 62.2756 15.8/--- 9 58.7079 17.6/--- 80 56.3694 19.4/--- 7 52.2438 21.2/--- 6 49.3161 23/--- 5 46.5725 24.8/--- 4 26.6/--- 3 41.5878 28.4/--- 2 39.8239 30.2/--- 1 37.1988 32/0 35.2024 33.8/1...
- Page 43 A7 - - Fuse Chart Unit Size The 3.15A fuses protect the board against the indoor or outdoor fan motors. The 2A fuses protect the board against a Class II circuit board failure. A8 - - Indoor Unit Diagnostic Guides Operation Timer Lamp...
- Page 44 Catalog No.38---40MV ---1SM Copyright 2008 Carrier Corp. S 7310 W. Morris St. S Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 03/08 Replaces: New Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
Need help?
Do you have a question about the High Wall Duct Free Split System 38MVC and is the answer not in the manual?
Questions and answers
I have replaced both board on the unit and still no function. Replaced the battery on hand held thermostat.
If the Carrier High Wall Duct Free Split System 38MVC is still not functioning after replacing both boards and the thermostat battery, potential issues could include:
1. Sensor Connection Issues – Check the sensor connectors at the indoor or outdoor board for loose or faulty connections.
2. Sensor Resistance – Test the sensor resistance for proper function. If resistance is incorrect, replace the sensor.
3. Wiring Issues – Inspect all wiring connections for corrosion, high resistance, or loose connections.
4. Compressor Overcurrent Protection – Ensure the unit is operating within the specified ambient temperature range and that the outdoor coil is clean.
5. Outdoor Fan Functionality – Verify the outdoor fan motor is operating correctly. If not, replace the motor.
Following these troubleshooting steps can help identify and resolve the issue.
This answer is automatically generated