Daikin REYQ8-48PY1B, Service Manual

Page: 168 / 477

Test Operation SiBE37-701_B
157 Test Operation
1.2 Procedure and Outline
Follow the following procedure to conduct the initial test operation after installation.
1.2.1 Check Work Prior to Turn Power Supply On
Check the below items.
• Power wiring
• Control transmission wiring
between units
• Earth wire
Check on refrigerant piping /
insulation materials
Check air tight test and vacuum
drying.
{
Is the wiring performed as specified?
{
Is the designated wire used?
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Is the wiring screw of wiring not loose?
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Is the grounding work completed?
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Is the insulation of the main power supply circuit deteriorated?
Use a 500V megger tester to measure the insulation. (*1)
• Do not use a megger tester for other circuits than 200V (or
240V) circuit.
*1: Measure to be taken against decreased insulation resistance in
the compressor
{
Is the pipe size proper?
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Are the design pressures for the liquid pipe, suction pipe, dual
pressure gas pipe, and pressure equalizer pipe (in case of multi
units) all not less than 4.0 MPa?
{
Is the pipe insulation material installed securely?
Liquid, suction and high & low pressure gas pipe need to be
insulated. (Otherwise causes water leak.)
If the compressor is left to stand for
an extended period of time after the
refrigerant charge with the stop valve
open and the power supply OFF, the
refrigerant may be mixed in the
compressor, thus decreasing the
insulation resistance.
Heat the compressor as shown on
the right and then recheck the
insulation.
{
Have the air tight test and the vacuum drying been conducted
according to the procedure in the Installation Manual?
Dryer
(1000W)
Terminal
5cm
Heat the left side of the
terminal for a period of
approximately 15 minutes.