Introduction - Hitachi RAS-5HVRNM1E Service Manual

10 Servicing

10.1 Introduction

D A N G E R
• Before performing any of the service operations described in this chapter, turn all the main switches off and
the place security lockers or convenient warning indicators in order to prevent them from turning on
accidentally.
• In case of blocked or stucked parts, use appropiated tools and eventually lubricants to release them.
• In case of sharped edged parts, as covers, use security gloves to avoid getting injured.
• When performing brazing work, besides security gloves it is must to wear convenient eye protection.
• Check and be sure that the LED201 (Red) on the inverter PCB is OFF for all electrical maintenance.
• Do NOT touch the electrical components when the LED201 (Red) on the inverter PCB is ON to avoid electrical
shock.
N O T E
• All compressors are connected by brazing. Check to ensure whether there are flammable things around or not
when using a burner for pipe connections, if not, oil existing pipe inside may ignite.
• Do not expose the refrigerant cycle to the atmosphere for a long period in order to avoid mixing the water and
foreign particles into the refrigerant cycle. After removing compressor, replace it quickly. If exposed for a long
period, seal the suction pipe and discharge pipe.
• Remove the cap for the compressor just before replacing the compressor. Before mounting the compressor,
seal the suction pipe and discharge pipe with a tape to protect the compressor from foreign particles. Remove
the tape at pipe connection.
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SMGB0060 rev. 1- 12/2010