<span role="presentation" dir="ltr" style="top:1.88%; left:44.18%">– MEMO –</span>

special precautions

check of density limit

precautions for installation using new refrigerant

indoor units

Outdoor Unit

combination of outdoor units

model selecting and capacity calculator

tubing length

system design

wiring system diagram

selecting the installation site

how to process tubing

optional parts

Wireless Remote Controller

Section 6: ELECTRICAL DATA

specifications

noise criterion curves

Capacity Ratio of Outdoor Unit

capacity table

Cooling Capacity of Indoor Unit

Panasonic U-72MF2U9 Technical Data Manual

installation instructions

IMPORTANT

Check of Density Limit

Precautions for Installation Using New Refrigerant

New refrigerant R410A cannot be used for earlier models

GENERAL

1-5. Tubing Length

1-6. Tubing Size

1-7. Straight Equivalent Length of Joints

1-9. System Limitations

1-10. Installation Standards

1-12. Installing Distribution Joint

1-13. Optional Distribution Joint Kits

1-14. Optional Solenoid Valve Kit

1-15. Example of Tubing Size Selection and

Refrigerant Charge Amount

SELECTING THE INSTALLATION SITE

2-2. Shield for Horizontal Exhaust Discharge

2-5. Dimensions of Wind Ducting

2-6. Dimensions of Snow Ducting

HOW TO INSTALL THE OUTDOOR UNIT

3-3. Routing the Tubing

3-4. Prepare the Tubing

ELECTRICAL WIRING

4-2. Recommended Wire Length and Wire

HOW TO PROCESS TUBING

5-2. Connecting Tubing Between Indoor and

Outdoor Units

AIR PURGING

TEST RUN

test run procedure

auto address setting

U-120MF2U9

operating instructions

product information

installation location

operation condition

names of parts

Section 1: CONTROL FUNCTIONS

Introduction

Selecting Outdoor Unit for Operation

Compressor Control

Output of PCB

Outdoor Fan Control

Outdoor Unit CCU (command controller unit) Control

Tube Refrigerant Recovery Control

Oil Control

Defrost Control

Discharge Tube Accumulated Refrigerant Recovery Control

Upper Current Limitation Mode (Demand control)

Backup Operation

Other Functions

Detailed Settings in EEPROM of Outdoor Unit

Outdoor Unit Control PCB

control functions

Section 2: OUTDOOR UNIT REPAIR PROCEDURES

Removing Panels

Discharging Compressor Oil

Recovering Refrigerant

Checking for Leakage After Repair

Evacuating System

Charging Compressor Oil

Compressor

Replacing Peripheral Parts of Fusible Plug

High and Low Pressure Sensors

Section 3: OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER

Overview

Functions

Ordinary Display Controls and Functions

Monitoring Operations

Outdoor Unit Alarm History Monitor

Mode Settings

Section 4: REMOTE CONTROLLER FUNCTIONS

Simple Settings Function

Detailed Settings Function

indoor fan performance

Remote Controller Servicing Functions

Section 5: TROUBLE DIAGNOSIS

Contents of Remote Controller Switch Alarm Display

Outdoor Unit Control Panel LED Display

WAY Alarm Codes

Blinking Inspection Display on the Remote Controller

Inspection and Characteristics of Parts

Test Pin

Symptom: Thermostat in OFF continues or cycles OFF & ON too frequently

Section 6: TEST RUN

Preparing for Test Run

Test Run Procedure

Main Outdoor Unit PCB Setting

Function Switches on P. C. Board

Auto Address Setting

Setting Test Run Remote Controller

Caution for Pump Down

U-144MF2U9

U-72MF2U9

U-96MF2U9