Service manual

HEC-Series Service Manual
ELECTRICAL CONTROLS & THEIR FUNCTIONS
10/21/01
6-13
S10 - Start S11 - Standby
In 0 1 2 3 4 5 6 7
¢ ¢ ¢ ¢ ¢ l l l
In 0 1 2 3 4 5 6 7
¢ ¢ ¢ ¢ ¢ l l l
Out 0 1 2 3 4 5
¢ ¢ ¢ ¢ ¢ ¢
Out 0 1 2 3 4 5
¢ ¢ ¢ ¢ ¢ ¢
Note: Inputs # 0 or # 1 may be “on”. If machine has shut off due
to a High pressure fault, input 6 will be “off”.
Note: If Ice button, Input # 5 is “off”, Input # 0 or # 1 may be
“on”.
S12 - Freeze (Cylinder Ice) S12 - Freeze (Crushed Ice - 5 minutes into freeze)
In 0 1 2 3 4 5 6 7
l ¢ ¢ ¢ ¢ l l l
In 0 1 2 3 4 5 6 7
¢ l ¢ ¢ ¢ l l l
Out 0 1 2 3 4 5
¢ l l ¢ l ¢
Out 0 1 2 3 4 5
¢ l l l l ¢
Note: Input # 2 will come “on” to initiate the harvest cycle. Note: Input # 2 will come “on” to initiate the harvest.
S13 - Harvest (Cylinder Ice) S13 - Harvest (Crushed Ice)
In 0 1 2 3 4 5 6 7
l ¢ ¢ ¢ ¢ l l l
In 0 1 2 3 4 5 6 7
¢ l ¢ ¢ ¢ l l l
Out 0 1 2 3 4 5
¢ ¢ l ¢ ¢ l
Out 0 1 2 3 4 5
¢ ¢ l l ¢ l
Note: Input # 2 will be “on” at the start of the Harvest, but will
turn “off” as thaw gas pressure rises.
Note: Input # 2 will be “on” at the start of the Harvest, but will
turn “off” as thaw gas pressure rises.
S14 - Partial Pumpdown S15 - Total Pumpdown
In 0 1 2 3 4 5 6 7
¢ ¢ ¢ ¢ ¢ l l l
In 0 1 2 3 4 5 6 7
l l ¢ ¢ l ¢ l l
Out 0 1 2 3 4 5
¢ ¢ l ¢ l ¢
Out 0 1 2 3 4 5
¢ ¢ l ¢ l ¢
Note: If Ice button, Input # 5 is “off”, Input # 0 or # 1 may be
“on”.
Note: Input # 0 and # 1 may be “off”.
S16 - Clean S17 - Troubleshoot
In 0 1 2 3 4 5 6 7
l l l ¢ l ¢ ¢ l
In 0 1 2 3 4 5 6 7
¢ ¢ ¢ ¢ l l l ¢
Out 0 1 2 3 4 5
¢ ¢ ¢ ¢ l ¢
Out 0 1 2 3 4 5
¢ ¢ ¢ ¢ ¢ ¢
Note: As pressure builds in the freezer and at the compressor,
Input # 2 may turn “off” and Input # 6 turn “on”.
Note: Input’s # 0 and # 1 may be “on”.
Output lights will indicate the previous machine fault.
FIGURE 6-5
PLC Input/Output Display