Electrical System - Hitachi RCUE40AG2 Service Manual

Test run
500 V DC
Fig.1
100 ºC
over
Fig.2
pag. 21
SMGB0003 rev.0-01/2007

2.1.3. Electrical System

Fuse
−

Electrical
−

device
−
Compressor
−

Fan motor
−

Wire in the
−

unit
−
Local wiring
−

−
−
Electrical
−

expansion
valve
Confi rm visually if fuse is suitable. See technical catalogue
for detail regulation of fuse.
Confi rm individually if screws in installation part and wire
connection part are not loosed using driver. Check it
carefully since devices might be damaged if screws in wire
connection part are not tightened well.
Confi rm if the insulation resistance is more than 1MΩ in
500V DC. In case of below 1MΩ, do not operate the unit
since insulation of electrical device has failure.
Check if insulation works well. Do not operate the unit in
case of below 3MΩ in 500V DC (fi g.1)
Check if insulation works well. Do not operate the unit in
case of below 3MΩ in 500V DC. (fi g.1)
Confi rm touching directly with hands if the wiring is not
removed or loosed.
Confi rm the covered insulation part. Pay attention not to
touch it by wet hand or to touch directly the edge of metal
plate or high temperature part of electrical devices. (fi g.2)
Confi rm if earth wire is installed correctly and not broken.
Confi rm if R, S, and T phase are connected correctly.
Confi rm the local wiring size. If the volume is not suffi cient,
it may cause extreme heating or fi re.
Confi rm if convex part of electrical expansion valve coil
is well fi xed to concave part of electrical expansion valve
body.
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