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10-4
OPTIONS AND ACCESSORIES
Display of fault memories
(MEM flashes) Pressing up or down displays the last fault conditions that took the unit off line.
The first 25 faults are recorded. The top number displayed represents the fault memory. The
middle number represents the total number of faults that have occurred since the fault memory
was cleared.
To clear the memory, press and hold the up and down keys until the display is cleared.
Notes
If you press SELECT and do not change a parameter by pressing the up or down arrow keys, the
DTP-3 automatically returns to displaying the line voltage in a few seconds.
The new settings are saved in permanent memory when the display returns to displaying the line
voltage. The new settings may be verified by pressing the select button to sequence through the
various parameters.
To prevent tripping on a 1 volt change, the DTP-3 automatically calculates cut-in voltages for the
return from undervoltage conditions. The cut-out voltage is always based on user voltage and
tolerance settings, while the cut-in voltage is 3% closer to the nominal voltage setting. This
quality is sometimes referred to as hysteresis. This is to help reduce oscillation that may occur on
weak power distribution system. When the load is switched off due to undervoltage, the line
voltage will increase. Without the hysteresis, the monitor would switch the load back on, the line
voltage would again drop, and cause a continuous on-off-on cycling.
Wiring Power Monitor
1. Connect wires from Line side fuses to the Line side of the Compressor Motor Starter (1M).
2. Connect wires from Load side fuses to the Load side of the Compressor Motor Starter (1M).
3. Connect Power Monitor Relay Contacts, COM & N.O. connections shown as "A" & "B" on
the Figure 10-1, to wire # 12 & #13 in the ice machine's control panel.
Note: The jumper between #12 & #13 that was factory installed must be removed.
12/18/12
Power Monitor Kit, Vogt
Fuses, Vogt
#12A7504E29
FIGURE 10-1
Phase Protector, wiring schematic.
#12A7700K01
– 1Amp, 600V, Class CC
P24A & P34A Service Manual
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