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Hitachi RAM-36NP2A User Manual

Hitachi RAM-36NP2A
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NO. 0530E
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT
DECEMBER 2012
Refrigeration & Air-Conditioning Division
SERVICE MANUAL
PM
REFER TO THE FOUNDATION MANUAL
TECHNICAL INFORMATION
FOR SERVICE PERSONNEL ONLY
(W)
(A)
(kW)
(B.T.U./h)
(W)
(A)
(kW)
(B.T.U./h)
W
H
D
(kg)
RAI-25RPA
DC INVERTER (CEILING CASSETTE TYPE)
TYPE
MODEL
POWER SOURCE
TOTAL INPUT
TOTAL AMPERES
CAPACITY
TOTAL INPUT
TOTAL AMPERES
CAPACITY
DIMENSIONS
(mm)
NET WEIGHT
SPECIFICATIONS
580
285
580
20
RAI-ECPP
RAI-25RPA
RAI-35RPA
RAI-50RPA
CONTENTS
SPECIFICATIONS --------------------------------------------------------------------- 4
HOW TO USE -------------------------------------------------------------------------6
CONSTRUCTION AND DIMENSIONAL DIAGRAM ----------------------- 41
MAIN PARTS COMPONENT ----------------------------------------------------42
WIRING DIAGRAM -----------------------------------------------------------------43
CIRCUIT DIAGRAM ----------------------------------------------------------------45
BLOCK DIAGRAM ------------------------------------------------------------------49
BASIC MODE ------------------------------------------------------------------------ 51
REFRIGERATING CYCLE DIAGRAM----------------------------------------- 69
AUTO SWING FUNCTION ------------------------------------------------------- 71
DESCRIPTION OF MAIN CIRCUIT OPERATION -------------------------72
SERVICE CALL Q & A ------------------------------------------------------------ 76
TROUBLE SHOOTING ------------------------------------------------------------ 79
PARTS LIST AND DIAGRAM ---------------------------------------------------- 91
RAI-25RPA
RAI-35RPA
RAI-50RPA
COOLING
HEATING
INDOOR UNIT
1 PHASE, 50 Hz, 220-240V
RAI-50RPA
NOTE:
This manual describes only points that differ from
RAK-18,25,35,50QXA (PM No 0527E)
RAD-18,25,35,50RPA (PM No 0531E)
and
RAM-36NP2A (PM No. 0522E)
RAM-53NP2A, RAM-53NP3A (PM No. 0523E)
RAM-68NP3A (PM No. 0524E)
RAM-70NP4A (PM No. 0525E)
RAM-90NP5A (PM No. 0528E)
RAM-130NP6A (PM No. 0529E)
for items not described in this manual.
REFER TO THE SPECIFICATIONS PAGE (5)
RAI-35RPA

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Hitachi RAM-36NP2A Specifications

General IconGeneral
BrandHitachi
ModelRAM-36NP2A
CategoryAir Conditioner
LanguageEnglish

Summary

Safety During Repair Work

Working Standards for Preventing Breakage of Semiconductors

Specifications

Caution

Specification of Room Air Conditioner

Safety Precaution

Precautions During Installation

Essential safety measures to follow before and during unit installation.

Precautions During Shifting or Maintenance

Guidelines for safe handling and maintenance of the unit.

Precautions During Operation

Critical safety advice for operating the air conditioning unit.

Names and Functions of Each Part

Indoor Unit Indicators

Explanation of the meaning of indicator lamps on the indoor unit.

The Ideal Ways of Operation

For User's Information

Maintenance

Cleaning of Air Filter

Step-by-step guide for removing, cleaning, and re-installing the air filter.

Cleaning of Front Panel

Maintenance at Beginning of Long Off Period

After Sale Service and Warranty

Preparation Before Operation

Names and Functions of Remote Controller

Various Functions

Auto Restart Control

Functionality for automatic unit restart after power interruption.

Automatic Operation

How the unit automatically selects operating mode based on room temperature.

Heating Operation

Detailed explanation of the heating mode operation and settings.

Dehumidifying Operation

Instructions for operating the unit in dehumidifying mode.

Cooling Operation

Guide on how to use the unit for cooling operations.

Fan Operation

How to use the unit simply as a fan or air circulator.

Powerful Operation

Explanation of the maximum power operation mode.

Silent Operation

How to activate the ultra-slow fan speed for quiet operation.

Eco Operation

Details on the energy-saving ECO operation mode.

Leave Home(LH) Operation

Function to maintain room temperature at 10°C when the home is unoccupied.

Clean (One Touch Clean) Operation

Operation to dry the indoor heat exchanger after cooling to prevent mildew.

Once Timer (On/Off Timer) Operation

Eco Sleep Timer Operation

Weekly Timer Operation

Construction and Dimensional Diagram

Main Parts Component

Thermostat

Specifications and details related to the thermostat component.

Fan Motor

Specifications and connection details for the fan motor.

Wiring Diagram

Circuit Diagram

Block Diagram

Basic Mode

Cooling Sleep Operation

Cooling Powerful Operation

Dehumidifying Operation

Dehumidifying Sleep Operation

Dehumidifying Powerful Operation

Basic Heating Operation

Reversing Valve Defrosting

Heating Sleep Operation

Heating Powerful Operation

Clean Operation

Leave Home

Refrigerating Cycle Diagram

Auto Swing Function

Description of Main Circuit Operation

Receiver Circuit

Explanation of the infrared signal receiver circuit.

Buzzer Circuit

Details on the operation and components of the buzzer circuit.

Auto Sweep Motor Circuit

Room Temperature Thermistor Circuit

Heat exchanger temperature thermistor circuit

Description of the circuit that detects indoor heat exchanger temperature.

Initial Setting Circuit (IC401)

Dip-switch

Explanation of dip switch functions and settings.

Service Call Q & A

Auto Fresh Defrosting

Auto Operation

How fan speed is automatically controlled during auto operation.

Nice Temperature Reservation

Function to start operation earlier to reach preset temperature on time.

Infrared Remote Control

Issues related to timer setting and clock display on remote control.

Others

Troubleshooting When Timer Lamp Blinks

Fault Diagnosis Codes

Detailed list of error codes and their meanings for indoor and outdoor units.

Self-Diagnosis Memory Function

Checking Indoor Unit Electrical Parts

Power does not come on (no operation)

Troubleshooting steps when the unit fails to power on.

Only indoor fan does not operate (other is normal)

Indoor fan speed does not change (other is normal)

Air deflector does not move (other is normal)

How to Change the Shift Value Setting Temperature Using Wireless Remote Controller

How to Change the Shift Value for Setting Temperature Using Wired Remote Controller

Setting the Prevention of Mutual Interference for Remote Controller

Operation Mode Lock Setting

Display Operation Mode Setting

Checking the Remote Controller

Parts List and Diagram

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