Thermo King 098203, Maintenance Manual

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Operating Instructions
62
DEFROST Mode
1. Unplug unit and turn main CB OFF located in the control box.
2. Locate J1 connector disconnected in the FULL Cool mode. Disconnect the jumper wire from pin 1 to
pin 6.
3. Disconnect the black heater wires (not Brown wire) from J7 on the PM and connect them to the input
side (left side) of the compressor contactor.
4. Plug unit in and turn main CB ON to defrost coil and OFF once no water is going from drains.
IMPORTANT: DO NOT LEAVE THE HEATERS ON FOR MORE THAN 1 HOUR. When running a
unit in Defrost mode DO NOT leave unit unattended.
5. To return to the FULL COOL mode. Turn main CB OFF and unplug unit Remove the heater wires
from the compressor contactor and re-tighten the input wires. Reinstall the jumper wire on J1
connector pin 1 to pin 6.
High or Low Speed Fans Only
1. Unplug unit and turn main CB OFF located in the control box.
2. Locate J1 connector disconnected in the FULL Cool mode. Disconnect the jumper wire from pin 1 to
pin 6.
3. Disconnect EF1, EF2, EF3 for low speed from J10 or EF11, EF12, EF13 for High speed from J9
4. Depending on what speed connect the EF to the output side of the compressor contactor (left side).
5. Plug unit in and turn main CB ON and OFF to maintain box temperature.
CAUTION: Running unit with evaporator fans only will add heat to the box, do not leave unit
unattended.
1. Black Heater Wire Connected to Compressor Contactor Input Side
2. J1 Connector with Pin 1 Wire Disconnected
Figure 30: FULL COOL Mode
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