Maintenance
19
Replacing the Load Resistor
1. Remove the vent plug and install the shipping plug.
2. Stand the unit on its back with the connector end up.
Note:
In this position there is no danger of the coolant pouring out
through the socket plug hole.
3. Unscrew and remove the clamping band.
4. Lift the load resistor assembly out of the tank and allow any coolant to
drip back into the tank.
5. Check the O-Ring.
Note:
It should be free of twists and positioned evenly around the
flange of the resistor housing.
Note:
If the O-ring shows signs of deterioration (e.g. is no longer
pliable or has surface cracks) replace it.
6. Replace the entire load resistor assembly.
Note:
It cannot be further disassembled.
7. Put the clamping band in place and tighten it.
8. Remove the shipping plug and install the vent plug.
Replacing the Fan
1. Remove the four 8-32 pan head screws from the front and back of the base frame.
2. Pull the fan guard straight off the bottom.
3. Carefully unsolder the color coded connecting wires.
Note:
Note the connections for resoldering.
4. Remove the four fan mounting screws.
5. Remove the defective fan.
Note:
Be careful not to lose the lipped retaining washers.
6. Insert the replacement fan with the fan blade assembly facing down,
towards the fan guard grill.
7. Insert the mounting screws and retaining washers into the mounting holes.
8. Turn the washers so that the lipped portion fits over the rim of the fan frame.
9. Tighten the screws.
Note:
If the fan replaced is the one closest to the power socket, reat-
tach the green ground wire to the closest mounting screw.
10. Solder the connecting wires to the solder lugs on the motor unit according
to the color coding.
11. Replace the fan guard and screws.
Note:
Before reattaching the blower assembly to the load, check the
fans for free and unimpeded movement of the blades.
12. Connect the unit to AC power.
13. Set the switch to MANUAL momentarily to check that the fans work properly
14. Set the switch back to AUTOMATIC.
WARNING
Disconnect the unit from all power sources before servicing. The unit may
be energized from multiple sources. The potential for electric shock exists.
深圳市新朗普电子科技有限公司
www.xLp17.com Email:[email protected]
TEL:0755-83986300 FAX:0755-88850515
QQ:55178055 285480356
深圳市新朗普电子科技有限公司
www.xLp17.com Email:[email protected]
TEL:0755-83986300 FAX:0755-88850515
QQ:55178055 285480356