Hoshizaki RF28A, Руководство по обслуживанию

Страница: 10 / 47

10
C. Control Board
• A HOSHIZAKI exclusive solid-state control is employed in all Hoshizaki refrigerators
and freezers.
• All models are pretested and factory-adjusted.
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 if it goes bad.
5. Do not short out power supply to test for voltage.
6. Keep the thermistor leads, 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.
1. Start-Up Delay
The start circuit of the compressor is timed such that at power-up and during any
compressor off time, there will be at least a 3 minute delay before the compressor will
start. This delay is controlled through the control board.
Note: The compressor must run 3 minutes minimum during every run cycle.