Premier NV-1543 Service Manual Download Page 5

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BCD-230W 260W Service Manual

Printed at April 23, 2002

Insulation resistance between power cord and
grounding cord should be at least more than 2 M

(tested by a 500 V M

meter).

1.2.1.2

High Voltage Durability

There must be no any flash and break-down when
50Hz sine AC current voltage is gradually raised
from 750V to 1500V and held on for 1 minute that
are loaded between power cord and grounding cord.
The test must be performed on a high voltage test
device that has a capacity more than 0.5 kilo-Volt-
Amperes.

1.2.1.3

Grounded Resistance

The refrigerator should be grounded well. The
resistance between the grounding wire and any
touchable metal part of the refrigerator should be
less than 0.1

(tested by a grounding resistance

meter). The color of earth line is yellow/green.

1.2.1.4

Current Leakage

Connect refrigerator into a circuit as the diagram.
When the refrigerator runs normally, the current
leakage between line and neutral wire (L/W) of
power cord and any touchable metal part of the
refrigerator should be no more than 1.5 mil-
amperes.

After maintenance, both insulation resistance and
high voltage durability must pass the test before
the refrigerator is reused.

1.2.1.5

Start-up Capability

Those include higher voltage start-up and lower
voltage start-up procedure. Starting refrigerator at
higher voltage start-up or lower voltage start-up
under an ambient temperature of 38

, each time

when the refrigerator is powered on, it is allowed

that the overload protector could switch off no
more than twice.

For higher voltage start-up test, the refrigerator
should be started 3 times in succession with a 242
voltage without any failure.

For lower voltage start-up test, the refrigerator
should run 3 hours first continuously, and after a 3
minutes pause, the refrigerator should be start-up
with a 187 V voltage for 3 times in succession
(each time running for 3 minutes, stopping for 3
minutes) without failure.

1.2.1.6

Motor Winding Temperature

The compressor motor winding temperature in the
running should no more than 130

. For the

measure of winding temperature, the refrigerator
should run for 4 hours continuously, then measure
the motor resistance within 15 seconds after stop.
The motor winding temperature could be
calculated according to following formula:

= (R

) x (t

+ 234.5)

234.5

winding temperature when stopping of

the measure,

;

resistance of running winding when

stopping of the measure,

;

resistance of running winding at

temperature of t