13.2.2 Clean / Replace the Heat Exchanger
WARNING
Drain the reservoir before the disassembly of the cooling unit. See 13.2.3.
Clean the Heat Exchanger:
Use a diluted solution of 5% acetic acid or any copper-safe aqueous acidic
cleaning solution and flush the heat exchanger periodically depending on the
mineral concentration in the cooling water. There is no need to remove the
unit for cleaning.
Replace the Heat Exchanger:
1.
Switch off the power of the controller and follow lockout / tagout
procedures.
2. Unplug all coolant and electrical connections from the cooling unit.
3. With assistance, unscrew the four M10 mounting screws from inside the
cabinet and place the cooler on a work bench.
4. Unscrew the plastic pipe plug which is between the inlet and outlet ports
on the bottom of the unit.
5. Unscrew the M10 nut which is seen below the plug.
6. Remove the lower reservoir plug.
a) Tap the plug with a rubber mallet to overcome seal friction.
7. Unscrew the hose
fittings f
rom the ports of the heat exchangers.
8. Unscrew and remove the heat exchanger coil from the reservoir plug.
NOTE
Installation is the reverse of disassembly.
13.2.3 Troubleshooting
Table 13-2 Troubleshooting
Symptom
Resolution
Water leak emerging from beween
pump enclosure and upper plug.
Remove the pump enclosure by undoing the
four acorn nuts on top. Inspect threaded fitting
connections. Inspect pump inlet tubing for
damage. Repair or replace as required.
Water leaking at connections on
closed or open circuit sides.
Tighten threaded connections or replace.
Inspect tubing and hoses for damage. Repair
or replace as required.
Low flow through heat exchanger
(open loop side connections).
Follow instructions in section “13.2.2 Clean /
Pump does not turn on when
cabinet is powered up.
Check that the cabinet exhaust fans are
running, if they are not, reset the 5A breaker
that they share with the pump. The breaker
is located in the high voltage side of the
controller. Turn controller off before opening
door.
13-3
SERVO COOLING OPTION
E-Multi User Manual
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