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Section 1: SPECIFICATIONS .....................................................................................................1-1
1-1 Unit SpecifIcations ..............................................................................................1-2
1-2 Major Component SpecifIcations ......................................................................1-20
1-3 Other Component SpecifIcations ......................................................................1-35
1-4 Dimensional Data..............................................................................................1-38
1-5 Refrigerant Flow Diagram .................................................................................1-48
1-6 Operating Range ...............................................................................................1-49
1-7 Capacity Correction Graph According to Temperature Condition .....................1-50
1-8 Noise Criterion Curves ...................................................................................... 1-51
1-9 Increasing the Fan Speed ................................................................................. 1-56
1-10 Air throw distance chart ....................................................................................1-57
1-11 ELECTRICAL WIRING ..................................................................................... 1-60
1-12 Installation Instructions ..................................................................................... 1-63
1-13 HOW TO PROCESS TUBING .........................................................................1-118
1-14 LEAK TEST, EVACUATION AND ADDITIONAL REFRIGERANT CHARGE ....1-122
Section 2: PROCESSES AND FUNCTIONS ..............................................................................2-1
2-1 Room Temperature Control .................................................................................2-2
2-2 Cold Draft Prevention (Heating Cycle) ................................................................ 2-4
2-3 Automatic Fan Speed (Indoor Unit) ..................................................................... 2-5
2-4 Control Functions ................................................................................................2-6
2-5 Outdoor Unit Control PCB...................................................................................2-9
2-6 Outdoor Unit Control PCB (CR-CH4272R) .......................................................2-10
Section 3: ELECTRICAL DATA ..................................................................................................3-1
3-1 Indoor Units ........................................................................................................3-2
3-2 Outdoor Units ....................................................................................................3-10
Section 4: SERVICE PROCEDURES .........................................................................................4-1
4-1 Meaning of Alarm Messages .............................................................................. 4-2
4-2 Symptoms and Parts to Inspect ..........................................................................4-5
4-3 Details of Alarm Messages ................................................................................. 4-8
4-4 Table of Thermistor Characteristics ..................................................................4-14
Section 5: OUTDOOR UNIT MAINTENANCE REMOTE CONTROL ........................................5-1
5-1 Overview .............................................................................................................5-2
5-2 Functions ............................................................................................................5-2
5-3 Normal Display Operations and Functions .........................................................5-3
5-4 Monitoring Operations: Display of Indoor Unit and Outdoor Unit Sensor
Temperatures ......................................................................................................5-6
5-5 Monitoring the Outdoor Unit Alarm History: Display of Outdoor Unit
Alarm History ......................................................................................................5-7
5-6 Setting Modes: Setting the Outdoor Unit EEPROM ............................................5-7
Section 6: TSET RUN .................................................................................................................6-1
6-1 Preparing for Test Run ........................................................................................6-2
6-2 Caution ...............................................................................................................6-3
6-3 Test Run Procedure ............................................................................................6-3
6-4 Items to Check Before the Test Run.................................................................... 6-4
6-5 Test Run Using the Remote Controller ...............................................................6-4
6-6 Precautions .........................................................................................................6-4
6-7 Table of Self-Diagnostic Functions and Corrections (U1, K1, T1, F1 Type) ........6-5
6-8 Examples of Wiring Diagrams .............................................................................6-6
Contents