SERVICE MANUAL
76
10SEP02 – 9B8949
Checking the WATER SOLENOID VALVE
[1]
Enter mode 6. See
[2]
Press and hold the “RUN” BUTTON on the
CONTROL BOARD.
Note
• Pressing and holding the “RUN” BUTTON:
– actuates the circuit for the WATER SOLENOID
– illuminates LED 11 on the DRIVE BOARD
• LED 6 might illuminate for 0.5 seconds, but LED 6
is not used in this evaluation.
[3]
If the WATER SOLENOID VALVE does not operate, check the input voltages:
[4]
Are the voltages correct?
[5]
If the input voltages are correct and the SOLENOID VALVE does not operate, check the output voltages:
[6]
Are the output voltages correct?
H164_0034AC
FIX.
DEV.
RUN
Rep.
Dev. Temperature
Low
Ready
High
Service
Position on the DRIVE BOARD
“RUN” BUTTON
Voltage
P1 (GND), PIN 1 on U1
pressed
0 - 1 V DC
P1 (GND), PIN 1 on U1
released
4 - 5 V DC
Yes
No
a. Check:
• I/O BOARD
• I/O BOARD/DRIVE BOARD CABLE
b. If necessary, install a new part.
Position on the DRIVE BOARD
“RUN” BUTTON
Voltage
PIN 1 to PIN 2 on CNP6 on the DRIVE BOARD
pressed
9 V DC, following a
24 V DC pulse
PIN 1 to PIN 2 on CNP6 on the DRIVE BOARD
released
0 V DC
Yes No
a. Check the WATER SOLENOID VALVE.
b. If necessary, install a new WATER
SOLENOID VALVE.
a. Check the DRIVE BOARD.
b. If necessary, install a new DRIVE BOARD.
Содержание X-Omat 1000
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