Servicing Procedures; Safety Considerations; Electrical Safety Test - Fisher & Paykel RF201A Service Manual

12

SERVICING PROCEDURES

12.1

SAFETY CONSIDERATIONS

CAUTION
ALL TERMINALS AND INTERNAL PARTS SHOULD BE
TREATED AS ALIVE.
ALL SERVICING SHOULD BE CARRIED OUT WITH THE REFRIGERATOR
DISCONNECTED FROM THE POWER SUPPLY.
Before servicing this appliance, your body should be at the same voltage potential. An antistatic wrist strap
must be used when handling electronic components.
Printed circuit boards removed from the refrigerator for return to Fisher & Paykel must be protected from
possible electrostatic damage (ESD) while in transit by the use of the specialised packaging in which the
replacement was received.
ELECTROSTATIC DISCHARGE SENSITIVE DEVICES
Diagram
12.2

ELECTRICAL SAFETY TEST

Whenever any part of the electrical circuit is serviced or disturbed in the course of carrying out service
adjustments or procedures, it is essential that an insulation and earth continuity test be carried out using a two-
scale Insulation Tester. This is to be done with the appliance disconnected from power.
Insulation: At least 1 megohm
Earth Continuity:
NOTE: Electronic printed circuit boards can be damaged if tested incorrectly as phase / earth or neutral /
earth.
Therefore to carry out an insulation test where the appliance is fitted with a electronic printed circuit board,
short out both the phase and neutral conductors together at the 3 pin plug with one test lead of the Insulation
Tester. Connect the other lead of the Insulation Tester to the earth pin / cabinet of the refrigerator under test.
Earth continuity can be measured between the earth pin on the 3-pin plug and the cabinet of the refrigerator.
No greater than 0.5 ohm
49
819091D