Hitachi RAS-4.0PNNBDH1 User Manual

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SERVICE MANUAL

PRIMAIRY

LARGE SINGLE SPLIT

DC-INVERTER SERIES

MODELS

MODELS

HS2021393HA

SM)-210131

INDOOR UNITS

OUTDOOR UNITS

DUCTED

RPIL-1.0PNN1DH

RPIL-1.5PNN1DH

RPIL-2.0PNN1DH

RPIM-3.0PNN1DH

RPIM-4.0PNN1DH

CASSETTE

RCIM-1.0PNN1DH

RCIM-1.5PNN1DH

RCI-2.0PNN1DH

RCI-3.0PNN1DH

RCI-4.0PNN1DH

RAS-1.0PNNBDH1

RAS-1.5PNNBDH1

RAS-2.0PNNBDH1

RAS-3.0PNNBDH1

RAS-4.0PNNBDH1

Table of Contents

Other manuals for Hitachi RAS-4.0PNNBDH1

Installation & Maintenance Manual16 pages

Questions and Answers:

P
phillipsrobertAug 10, 2025
Why is my Hitachi Inverter air conditioner not cooling/heating properly?
- S
  Susan JohnsonAug 10, 2025
  There are several reasons why your Hitachi Inverter air conditioner might not be cooling or heating effectively. It could be due to a dirty outdoor heat exchanger (like the condenser), heating devices operating indoors, insufficient air tightness in the room, a blockage of the outdoor heat exchanger, or an incorrect temperature setting. To resolve this, try cleaning the outdoor unit's heat exchanger, removing any heating devices, ensuring the room is properly sealed, removing any obstacles blocking the outdoor unit, and verifying that the temperature is set correctly.
L
Laura MataAug 15, 2025
What to do if my Hitachi Inverter air conditioner won't start up?
- M
  Michelle MccoyAug 16, 2025
  If your Hitachi Inverter air conditioner isn't starting, the issue could stem from several causes. First, check the power supply circuit to ensure it's functioning correctly. Second, measure the insulation resistance to ground to check for any leakage. Third, inspect the power supply circuit for defective contacts or leak current. Fourth, double-check the remote controller settings. Finally, replace the remote controller batteries.
S
Steve MillerAug 21, 2025
What to do if my Hitachi Inverter air conditioner is leaking water?
- A
  aguilarrobertAug 21, 2025
  If your Hitachi Inverter air conditioner is leaking water, it could be due to a blocked or broken drainage pipe, or the refrigerant pipe joint not being completely sealed. To fix this, try changing the drainage pipe. Also, re-wrap the refrigerant pipe joint to ensure it is tight.
M
Mike SandersAug 28, 2025
Why does the compressor in my Hitachi Inverter start and stop frequently?
- T
  Thomas SmithAug 28, 2025
  If the compressor in your Hitachi Inverter is starting and stopping frequently, it's likely that the air inlet or outlet is blocked. Remove any obstacles to resolve this.
C
Connie CardenasSep 2, 2025
Why is my Hitachi Inverter making sounds from deforming parts?
- J
  Jessica HarrisSep 2, 2025
  During the system's starting or stopping, you might hear a sound. This sound is due to the normal deformation of plastic parts. This is not abnormal, and the sound will disappear soon.

Hitachi RAS-4.0PNNBDH1 Specifications

General

Brand	Hitachi
Model	RAS-4.0PNNBDH1
Category	Air Conditioner
Language	English

Summary

1. OPTION LIST

Wired Remote Controller Installation

Wired Controller Installation Steps

Wired Controller Custom Parameters

Temperature Limit Setting for Wired Controller

Room Temperature Correction via Wired Controller

Basic Wired Controller Operation Modes

Wired Controller Function Settings (Super & Mute)

Wired Controller Single Timer Setting

Wired Controller Weekly Timer Programming

Wireless Remote Controller Operations

Overview of wireless remote controller functions and models.

Wireless Remote Controller Buttons and LCD Symbols

Using the Wireless Remote Controller Effectively

Wireless Remote: Selecting Operation Modes

How to select different operation modes like Cooling, Dry, Fan Only, Heating.

Wireless Remote: Setting Temperature

Adjusting the desired temperature setting for cooling and heating.

Wireless Remote: Power On/Off Control

Instructions for turning the air conditioner unit on or off using the remote.

Wireless Remote: SMART Mode Operation

How to set and cancel SMART mode for automatic operation.

Wireless Remote: Quiet and Super Modes

Activating QUIET mode for low noise and SUPER mode for fast cooling/heating.

Wireless Remote: SUPER Mode Activation & Cancellation

Detailed steps for activating and cancelling the SUPER mode.

Wireless Remote: Timer Mode Setup

Setting timer ON for comfortable room temperature upon arrival.

Wireless Remote: Setting Timer ON

Step-by-step guide to set the timer for the unit to turn ON.

Wireless Remote: Cancelling Timer ON

Wireless Remote: IFEEL Mode Operation

Using the IFEEL mode to adjust temperature based on remote sensor.

Wireless Remote: SLEEP Mode Operation

1.3 IR Receiver

IR Receiver Operation and Signal Transmission

IR Receiver Installation Guide

Step-by-step instructions for installing the IR receiver unit.

2. TROUBLESHOOTING

Troubleshooting Guide for Normal Malfunctions

Common issues like startup problems, compressor cycles, cooling/heating, noise, and water leakage.

Troubleshooting by Fault Codes

How to identify and check fault codes displayed on the controller.

Troubleshooting: LED Fault Codes

Interpreting fault codes indicated by LED lamps on the display panel.

Outdoor Unit Fault Codes (1.0-2.0 HP)

Explanation of fault codes indicated by LEDs on the outdoor unit control board.

Outdoor Unit Fault Codes (3.0-4.0 HP)

Fault codes displayed on the digital tube board for 3.0/4.0 HP outdoor units.

Drive Board Fault Code Display

How drive board flashing indicates failure codes.

Outdoor Unit Fault Codes and Solutions

Table detailing outdoor unit faults, reasons, and how to deal with them.

Outdoor Unit Faults: Compressor, Pressure, AC, Suction, Defrost, IPM

Fault codes related to compressor, pressure switches, AC voltage, sensors, and IPM.

Outdoor Unit Faults: IPM, Temperature, Fan Motor, Refrigerant, Valve

Fault codes for IPM, discharge temperature, fan motors, refrigerant, and 4-way valve.

Indoor Unit Fault Codes and Solutions

Table detailing indoor unit faults, reasons, and solutions.

Indoor Unit Faults: EEPROM, Sensors, Communication

Fault codes for EEPROM, temperature sensors, and communication issues.

Overload in Cooling Mode Causes and Solutions

Details on causes and corrective measures for overload in cooling mode.

Overload in Heating Mode Causes and Solutions

Driving Board Fault Analysis (1.0-2.0 HP)

Driving Board Fault Analysis (3.0-4.0 HP)

Driving Board Faults: DC Voltage, EEPROM, PFC Chip

3. CHECKING COMPONENTS

Checking the Refrigerant System

Checking the Compressor

4. DISASSEMBLY PROCEDURE

Outdoor Unit Compressor & Motor Disassembly

3.0HP Outdoor Unit Disassembly

4.0HP Outdoor Unit Disassembly

5. CONTROL LOGIC DESCRIPTION

Cooling Mode Logic

Heating Mode Logic

Auto Mode Logic

Evaporator Low-Temperature Protection

Condenser High-Temperature Protection

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