Panasonic 3WAY VRF System U-72MF2U9 U-120MF2U9 U-96MF2U9 U-144MF2U9 Service Manual


Accurate, clear and concise text, combined with detailed illustrations, instruction and diagrams, guide you through procedure of repair, remediate, maintenance and adjustments your Air Conditioner.
The information contained in this repair manual is necessary for the repair, but also prevention, resulting in a longer life of your appliance.
Format of the manual: PDF, makes it easy to navigate, instant download and print. English language.
To see what contain, please read table of contents:

Section 1: CONTROL FUNCTIONS
1. Introduction
2. Selecting Outdoor Unit for Operation
3. Compressor Control
4. Output of PCB
5. Outdoor Fan Control
6. Outdoor Unit CCU (command controller unit) Control
7. Tube Refrigerant Recovery Control
8. Oil Control
9. Defrost Control
10. Discharge Tube Accumulated Refrigerant Recovery Control
11. Upper Current Limitation Mode (Demand control)
12. Backup Operation
13. Other Functions
14. Detailed Settings in EEPROM of Outdoor Unit
15. Outdoor Unit Control PCB

Section 2: OUTDOOR UNIT REPAIR PROCEDURES
1. Removing Panels
2. Discharging Compressor Oil
3. Backup Operation
4. Recovering Refrigerant
5. Checking for Leakage After Repair
6. Evacuating System
7. Charging Compressor Oil
8. Pumping Out Refrigerant from Outdoot Unit
9. Compressor
10. Replacing Peripheral Parts of Fusible Plug
11. High and Low Pressure Sensors

Section 3: OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER
In the case of CZ-RTC2
1. Overview
2. Functions
3. Ordinary Display Controls and Functions
4. Monitoring Operations
5. Outdoor Unit Alarm History Monitor
6. Mode Settings
In the case of CZ-RTC4
7. Overview
8. Functions
9. Ordinary Display Controls and Functions
10. Monitoring Operations
11. Outdoor Unit Alarm History Monitor
12. Mode Settings

Section 4: REMOTE CONTROLLER FUNCTIONS
1. Simple Settings Function
2. Detailed Settings Function
3. Remote Controller Servicing Functions

Section 5: TROUBLE DIAGNOSIS
1. Contents of Remote Controller Switch Alarm Display
2. Outdoor Unit Control Panel LED Display
3. 3WAY Alarm Codes
4. Blinking Inspection Display on the Remote Controller
5. Inspection and Characteristics of Parts
6. Test Pin
7. Symptom: Thermostat in OFF continues or cycles OFF & ON too frequently

Section 6: TEST RUN
1. Preparing for Test Run
2. Test Run Procedure
3. Main Outdoor Unit PCB Setting
4. Function Switches on P. C. Board
5. Auto Address Setting
6. Setting Test Run Remote Controller
7. Caution for Pump Down
8. Self-Diagnosis Function Table and Contents of Alarm Display