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General| Brand | Carrier |
|---|---|
| Model | 38MBQ Series |
| Category | Air Conditioner |
| Language | English |
Ensures proper installation and servicing by trained personnel, and emphasizes reading manuals and following codes.
Details Electrical Shock, Explosion, and Equipment Damage hazards and necessary precautions.
Describes the manual's purpose to provide information for servicing, repair, and maintenance of the 38MBQ heat pumps.
Explains the meaning of each character in the model and serial number for identification.
Details electrical ratings, piping lengths, connection sizes, refrigerant type, and charge amounts.
Provides specs for outdoor coil, compressor, unit dimensions, weight, and fan details.
Illustrates the outdoor unit's physical layout with key dimensions and airflow paths.
Provides detailed drawings and measurements for the 36K outdoor unit size.
Presents detailed drawings and measurements for the 48K outdoor unit size.
Specifies minimum clearance dimensions (A, B, C, D, E) around the outdoor unit for proper operation and maintenance.
Details voltage, phase, MCA, MOCP, and compressor RLA for unit sizes.
Provides guidance on wire sizing, conductor types, and connection methods for power and communication.
Presents the detailed wiring diagram for the 36K outdoor unit, showing component connections.
Lists and describes the function of each terminal (CN) on the outdoor unit's main board.
Provides the detailed wiring diagram for the 48K outdoor unit, illustrating component interconnections.
Details the terminals and their functions on the outdoor unit's main board for the 48K model.
Lists material, type, dimensions, model, phase, FLA, insulation class, and input/output for outdoor fans.
Illustrates the refrigerant flow through indoor and outdoor heat exchangers, valves, and sensors.
Covers minimum/maximum lengths, insulation requirements, and installation precautions for refrigerant lines.
Details pipe sizes, refrigerant type (R410A), and charge amounts for different system sizes and lengths.
Explains the deep vacuum method using a pump and gauge to achieve 500 microns for system evacuation.
Details the triple evacuation process involving vacuum, nitrogen purge, and pressure checks for a dry system.
Specifies the minimum and maximum outdoor DB temperatures for cooling and heating operation.
Describes protections like three-minute delay, top temperature, and discharge temperature protection.
Details fan speed malfunctions and inverter module protection functions.
Lists the conditions that trigger the defrosting mode based on temperature and running time.
Explains the procedure to enter the information enquiry status and navigate through displayed codes.
Lists required tools and recommended steps for diagnosing unit problems, including checking diagnostic codes.
Details error codes (E0-E5, EC, EE) for indoor units, listing malfunctions and LED status indicators.
Lists error codes (E1, F0-F5, J0-J6) for outdoor units, specifying problems and their corresponding error codes.
Provides troubleshooting steps for EEPROM parameter errors (E0/F4), covering potential causes like installation mistakes or faulty PCBs.
Details the diagnosis and solution for overload current protection (F0), including checks for power supply and system blockage.
Outlines diagnosis and solutions for E1 communication errors, focusing on wiring integrity and PCB functionality.
Guides on testing DC voltage and reactor resistance to diagnose unit malfunctions and component integrity.
Explains how to measure DC motor voltage inputs and outputs at the control chip for troubleshooting.
Provides steps to diagnose open or short circuits in temperature sensors, checking connections and resistance.
Details the diagnosis and solution for refrigerant leakage detection (EC), including checking for leaks and blockages.
Outlines troubleshooting for IPM/IGBT over-current protection (PO), including checks for wiring and component health.
Details diagnosis and solution for over/under voltage protection (P1), including power supply and reactor checks.
Provides steps to diagnose compressor top high temperature protection (P2), checking airflow and overload protector status.
Outlines the diagnosis and solution for inverter compressor drive errors (P4), checking wiring, IPM, and compressor values.
Guides on checking temperature sensor resistance and compressor winding resistance for faults.
Details the procedure for measuring IPM resistance between specific terminals (P, UVWN, N) after discharging capacitors.
Details steps for removing the panel plate and fan assembly from the 36K outdoor unit.
Guides on disconnecting various electrical connectors and wires from the control board and components.
Provides steps to remove the compressor and four-way valve assembly, including refrigerant recovery.
Details steps for removing the fan assembly, grille, and panel components from the 48K outdoor unit.
Guides on disconnecting fan motor connectors and wires from the IPM board and PCB.
Provides steps to remove the compressor, 4-way valve, and expansion valve, including refrigerant extraction.
