How to fix current detecting circuit abnormal of compressor module in Haier MRV 5-RC AD162MJERA?
If the current detecting circuit of the compressor module is abnormal in your Haier Heat Pump, replace the inverter control board with abnormal current detection loop.
What to do if four-way valve reversing failure in Haier Heat Pump?
In case of a four-way valve reversing failure in your Haier Heat Pump, the suggested solution is to have it correctly replaced by after-sales service on site and ensure the refrigerant is sufficient.
How to fix outdoor compressor discharging temperature (Td1, Td2) too high failure in Haier MRV 5-RC AD162MJERA?
If the outdoor compressor discharging temperature (Td1, Td2) is too high in your Haier Heat Pump, the suggested solution is to have the discharging temperature sensor replaced by after-sales personnel on site.
What to do for fan motor module hardware over current in Haier MRV 5-RC AD162MJERA?
If the fan motor module in your Haier Heat Pump experiences a hardware over current issue, the solution is to replace the fan motor.
What to do if radiator temp. sensor of compressor module is abnormal in Haier MRV 5-RC AD162MJERA Heat Pump?
If the radiator temperature sensor of the compressor module is abnormal in your Haier Heat Pump, replace the variable frequency board.
How to resolve AT24C04 EEPROM communication failure in Haier MRV 5-RC AD162MJERA Heat Pump?
To resolve AT24C04 EEPROM communication failure, AT24C04 EEPROM data check failure, or IM EEPROM data or communication failure in your Haier Heat Pump, replace EE.
How to fix emergency stop function switch failure in Haier Heat Pump?
If the emergency stop function switch fails in your Haier Heat Pump, short circuit the CN18.
What to do if incorrect settings of quantity, address or capacity for outdoor unit in Haier MRV 5-RC AD162MJERA?
If there are incorrect settings of quantity, address, or capacity for the outdoor unit of your Haier Heat Pump, the suggested solution is to research and lock the outdoor unit.
What to do if discharging temperature sensor Td1 and Td2 failure in Haier MRV 5-RC AD162MJERA?
If the discharging temperature sensors Td1 and Td2 fail in your Haier Heat Pump, the solution is to have them correctly replaced by after-sales personnel on site.
What to do if outdoor unit compressor discharging temperature (Td1, Td2) too low failure in Haier MRV 5-RC AD162MJERA Heat Pump?
If the outdoor unit compressor discharging temperature (Td1, Td2) is too low in your Haier Heat Pump, the suggested solution is to have the discharging temperature sensor replaced by after-sales personnel on site.
Continues safety precautions, covering earthing, installation location, and handling of specific tools and refrigerants.
Details installation place selection criteria to ensure proper ventilation, stability, and avoid environmental interference.
Continues refrigerant pipe connection instructions, covering valve welding and pipe cutting.
Provides cautions for piping installation, such as nitrogen charging during welding and cleaning pipes.
Provides specifications for leakage protection switches and circuit breakers for outdoor units, including current ratings and wire sizes.
Details branch pipe dimensions for 3-pipe systems, showing diagrams and size specifications for manifold pipes.
Illustrates piping diagrams for different operating modes: All cooling and Cooling > Heating.
Illustrates piping diagrams for different operating modes: Cooling > Heating.
Illustrates piping diagrams for All heating / Heating > Cooling and Heating standby modes.
Illustrates piping diagrams for Cooling OFF mode.
Lists critical inspection items after installation, covering security, leakage, insulation, and wiring.
Ensures correct refrigerant type is used for proper system operation.
Details thermal insulation requirements for high-pressure gas, suction gas, and liquid pipes to prevent leakage and scalding.
Specifies enhanced thermal insulation thickness based on ambient humidity and temperature conditions.
Highlights critical points for piping connection, including tool usage and torque.
Illustrates connecting an indoor unit to the downstream of a valve box.
Illustrates connecting with branching in the downstream of the valve box.
Guides pipe dimension selection based on tables for valve box downstream and indoor unit connections.
Provides notes on pipe connection, emphasizing confirmation of HP/suction gas pipes and connection to the valve box.
Checks if the valve box installation is secure, looking for falling off, vibration, or noise.
Verifies if gas leakage inspection has been completed, checking for no heating/cooling issues.
Checks if complete insulation is achieved for refrigerant piping and tubing connections, looking for water leakage.
Verifies if the power supply voltage matches the nameplate, checking for out of service or burnt conditions.
Checks for improper wiring or piping, looking for out of service or burnt conditions.
Checks for construction without grounding, identifying danger in electric leakage.
Verifies if the wire thickness is as specified, checking for out of service or burnt conditions.
Prohibits using gases other than the specified refrigerant in the system.
Instructs to replace refrigerant if leakage occurs during operation, filling it at the outdoor unit.
Instructs to use pliers and torque spanner for connecting/removing pipes from the valve box.
Advises to fix the valve box and pipes securely to prevent shaking during installation.
Warns against using antioxidant for pipe welding to prevent tube blocking.
Warns against using flux in pipe welding due to corrosion risks and refrigerant oil deterioration.
Provides notes on pipe connection, emphasizing confirmation of HP/suction gas pipes and connection to the valve box.
Explains the identification of physical and functional master/slave units and the purpose of dip switches.
Details the functions of BM1 dip switches for outdoor unit settings like searching, mode, static pressure, and valve box type.
Details BM2 dip switches for outdoor unit heat mode setting.
Explains BM2 dip switches for outdoor unit wireless module MAC address and clearing EEPROM data.
Details BM3 dip switches for outdoor type selection.
Details BM3 dip switches for outdoor horse power setting.
Explains BM4 dip switches for ModeBus protocol selection.
Explains BM4 dip switches for ModeBus communication address settings.
Guides on setting E2 control parameters, including setting methods and notes on automatic operation.
Explains SW03 usage for setting valve box addresses automatically or via dip switch.
Provides a detailed table for setting communication addresses using SW03 dip switches.
Continues the table for setting communication addresses using SW03 dip switches.
Explains how SW1, SW2, SW3, and SW4 are used to set communication addresses for indoor units connected to the valve box.
Continues compressor control details, covering crankcase heater and start protection.
Details high and low pressure control in cooling and heating modes, including setting values.
Explains how high pressure is detected and used to control compressor capacity to prevent high pressure rise.
Details control actions when compressor current exceeds limits, including frequency reduction and stopping.
Lists outdoor unit failure codes and their corresponding descriptions, including sensor failures and communication issues.
Continues the list of outdoor unit failure codes, covering fan motor module radiator temp. too high.
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