[C] Before Checking Controller Board - Hoshizaki IM-240DNE Service Manual

[c] BEFORE CHECKING CONTROLLER BOARD

Check the power source voltage and the components as shown in the table below.
Component
1. Thermistor
(on evaporator)
Holder
Screw
Evaporator
Thermistor
2. Bin Control Switch
Procedure
CAUTION
Thermistor sensor part is fragile,
glass sealed. Handle with care.
* Disconnect the connector CN13 on
the board.
* R e m o v e t h e s c r e w a n d t h e
thermistor holder on the evaporator.
* Immerse the sensor part in a glass
c o n t a i n i n g i c e a n d w a t e r f o r 5
minutes.
* Check the resistance between CN13
connector pins.
* Replace the thermistor in its correct
position.
* Connect CN13.
Manually set the micro switch in the
TRIP and RESET positions, and
check the period.
19
Normal
5 -7 kilohms
Approx.
TRIP(Closed) 10 sec.
RESET(Open) 80 sec.