- 20 -
3- Place a jumper between pin #6 and pin #9 of the EXPANSION connector.
4- Be sure any wires or parts moved during installation of jumper will not cause an electrical short.
5- Reapply power to the unit and wait approximately 20 seconds, after which the unit will enter an auto- matic
system component test sequence. The system automatically runs through the operational functions of each
component within the unit. If the unit is equipped with a display, an abbreviated description of each function will be
displayed (display is where temperature and set points are viewed) as each function is tested. Table 2
describes the abbreviated descriptions that are displayed and unit operation. Only functions available to the unit
will be tested. Others will simply be ignored. This allows the technician to get a quick glimpse of whether the com-
pressor, motor speed, or heating components function properly during the automatic test function. Service
efforts can be directed to the various controls that operate the system.
6- Unplug or disconnect power to the unit.
7- Remove the jumper that was installed on pins #6 and #9 of the expansion connector.
8- Reapply power to the unit to resume normal operation.
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