Hoshizaki RF28A, Руководство по обслуживанию

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12) Replace the parts and panels in their proper positions in the reverse order of which
they were removed. Be sure to clip the clogged filter thermistor in the same location as
previous.
13) Plug in the unit, and turn on the power supply.
P. Removal and Replacement of Door Gasket
Remove old gasket by pulling it directly out of the vinyl gasket retainer. Thoroughly clean
the gasket area with mild soap and water prior to installing the new gasket. The new
gasket should be installed by assembling it at the corners first, then working toward the
center at the top, bottom and sides. The arrow-shaped portion of the gasket should be
firmly seated in the retainer groove for proper assembly. This can be checked by lifting
the edge of the gasket and observing the engagement.
CAUTION
In order to get a proper gasket fit, it is important not to stretch gasket material
during assembly.
Q. Removal and Replacement of Control Boards
IMPORTANT
When receiving a service call, please ask the customer to turn the power off,
then turn it back on and monitor the condition for awhile. Even if the control
board malfunctions for some reason, it may resume normal operation after the
power is turned off once.
CAUTION
1. Fragile, handle very carefully.
2. A control board contains integrated circuits, which are susceptible to failure
due to static discharge. It is especially important to touch the metal part of
the unit when handling or replacing the board.
3. Do not touch the electronic devices on the board or the back of the board to
prevent damage to the board.
4. Do not fix the electronic devices or parts on the board in the field. Always
replace the whole board assembly when it goes bad.
5. Do not short out power supply to test for voltage.
6. Keep the thermistors, clogged filter sensor leads, and pressure switch leads
at least 1.5" away from high voltage leads (AC 100 volts or more) to protect
against electrical noise.
Main Control Board
1) Turn off power and unplug the unit.
2) Open the front panel and the control box.
3) Unhook all wiring connections to the control board.