Edwards TCU 40/80 - Page 26

6 OPERATION
6.1 Preparation
Verify that water and coolant connections are made at both ends, that the drain valve is closed and the
coolant supply and return valves are open. Connect the remote interfaces if required.
1. To use an external RTD probe, attach it to connector J72J3. Refer to Figure 15 on page 56. Verify
that the plug J72J2 is installed.
2. Press the EMERGENCY OFF button on the front panel.
3. Plug the TCU 40/80 power cord into a fused, switchable, 30 amp, 3-phase, 208 VAC outlet.
4. Ensure that all circuit breakers on the rear panel are in the ON position. CB7 and CB8 are non-
switchable circuit breakers and will trip when there is a problem. They cannot be turned on or off, but
they are re-settablc.
6.2 Powering up the TCU 40/80
1. Verify that the POWER ON lamp on the front panel is illuminated.
2. Release the EMERGENCY OFF button.
If the Facility Power LED illuminates, the line
voltage is low, or the phase of the main power
supply is reversed.
Adjust the line voltage, if it is low.
Correct the phases by swapping two phases in the
electrical outlet.
3. Press the RESET button and verify the front panel indicators are as in the Reset Condition column of
Table 8.
Table 8 - Front panel power up indicator conditions
Indicator
POWER ON
RESET
FACILITY POWER
FACILITY WATER
CIRCUIT BREAKERS
COMPRESSOR
TEMPERATURE
FLOW
NORMAL LEVEL
LOW LEVEL
REMOTE RTD (if used)
Reset condition
Green
Off
Green
Green
Green
Off
Green
Off
Off
Red
Green
Start condition
Green
White
Green
Green
Green
Green
Green
Green
Green
Off
Green
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TCU 40/80 Temperature Control Unit