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Specifications for the maximum and minimum allowable lengths for refrigerant piping.
Limits and guidelines for the vertical height difference between units.
Specific considerations for installation and drainage in cold climate conditions.
Specifications and details for the outdoor unit's fan motor.
Details on the dehumidifying operation and its associated sleep mode.
Explanation of the circuit that supplies power to the control microcomputer and related components.
Details on the circuit that converts AC power to DC voltage for the unit's operation.
Important safety precautions and guidelines to follow before performing checks and inspections.
Procedure and interpretation of the unit's self-diagnosis function for fault detection.
Method for collecting refrigerant using the test switch for specific operational tasks.
Diagnostic steps for identifying issues like refrigerant leaks or compressor failures.
Flowchart for troubleshooting electrical components and failures in the outdoor unit.
Steps for preparing to access electrical components, including cover removal and connector disconnection.
Instructions for safely removing the inverter printed circuit board.
Instructions for safely removing the main printed circuit board.
Steps for correctly reassembling the inverter printed circuit board.
Steps for correctly reassembling the main printed circuit board.
Specifications for the maximum and minimum allowable lengths for refrigerant piping.
Limits and guidelines for the vertical height difference between units.
Specific considerations for installation and drainage in cold climate conditions.
Specifications and details for the outdoor unit's fan motor.
Details on the dehumidifying operation and its associated sleep mode.
Explanation of the circuit that supplies power to the control microcomputer and related components.
Details on the circuit that converts AC power to DC voltage for the unit's operation.
Important safety precautions and guidelines to follow before performing checks and inspections.
Procedure and interpretation of the unit's self-diagnosis function for fault detection.
Method for collecting refrigerant using the test switch for specific operational tasks.
Diagnostic steps for identifying issues like refrigerant leaks or compressor failures.
Flowchart for troubleshooting electrical components and failures in the outdoor unit.
Steps for preparing to access electrical components, including cover removal and connector disconnection.
Instructions for safely removing the inverter printed circuit board.
Instructions for safely removing the main printed circuit board.
Steps for correctly reassembling the inverter printed circuit board.
Steps for correctly reassembling the main printed circuit board.
General| Brand | Hitachi |
|---|---|
| Model | RAM-90NP5B |
| Category | Air Conditioner |
| Language | English |
