Thermo King UT-1200, Manual

Page: 87 / 169

Electrical Maintenance
87
Overload Relay Replacement
When the overload relay is replaced, the new
overload relay must be set up to open at the
correct amperage and reset automatically. See the
following procedure to set up a new overload
relay.
1. Open the clear plastic cover.
2. Use a small screwdriver to set the opening
amperage. See “Electric Motor and Overload
Relay” in the “Specifications” chapter for the
correct overload relay setting.
3. Use a small screwdriver to remove the tab
between the “H” and the “A” to access the
switch used to set the overload relay to reset
automatically.
4. Move the slide switch down until it clicks into
place at the bottom of the slot (from which the
tab marked “H” was removed). This sets the
overload relay to reset automatically.
The new overload relay is now set up correctly.
Note which wires go to which terminals when
removing the old overload relay so the wires are
connected correctly when the new overload relay
is installed.
1. Lift Here to Open Cover
Figure 154: Open Cover
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1. Set Opening Amperage
2. Remove Tab Between “H” and “A”
Figure 155: Set Amperage and Remove Tab
1. Switch Clicks into Place at Bottom of Slot
Figure 156: Move Switch Down
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