Table of Contents
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Chapter 4 Service
4.1 Manual Check
4.2 Automatic Pumpdown
4.3 Connecting and Removing Manifold gauges
4.4 Checking Non-Condensable Gas
4.5 Sight Glass
4.6 Refrigerant Recovery and Charge
4.6.1 Operation Pressure Check
4.6.2 Refrigerant Recovery
4.6.3 Vacuum and Dehydration
4.6.4 Refrigerant Charge
4.7 Electrical Circuit and Servicing Precautions
4.8 Parts Replacement
4.8.1 Replacing Compressor
4.8.2 Procedure of Evaporator Fan Motor Removing
4.8.3 Inverter board (EC8)
4.8.4 CPU board (EC1)
4.8.5 I/O board (EC2)
4.8.6 Operation board (EC3)
4.8.7 PT/CT board (EC7)
4.8.8 High Pressure Switch (HPS)
4.8.9 High Pressure Sensor (HPT)
4.8.10 Low Pressure Sensor (LPT)
4.8.11 Electronic Expansion Valve (EEV), Economizer Modulation Valve
(EMV), Discharge Modulation Valve (DMV)
4.8.12 Solenoid Valve
4.8.13 Dryer
4.8.14 Fusible Plug
4.8.15 Check Valve
4.8.16 Filter and Strainer
4.9 Emergency Operation at Controller Malfunction
4.9.1 Wiring Change of Controller
4.9.2 Fixing of EEV Opening
4.9.3 Fixing of EMV Opening
4.9.4 Fixing of DMV Opening
4-1
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Table of Contents
