Ingersoll-Rand Thermo King CRR DF MPC2000, Maintenance Manual

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Microprocessor Controller
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3. Disconnect cable no. 2 from the controller and main relay board (see electrical schematic).
4. Disconnect the 2-pin plug from J501 (see decal on main relay board). Re-locate plug according to the
function required: Defrost or Cool.
5. Connect the unit power cord to the proper power supply.
6. Turn the Unit On/Off switch to ON. Unit will start and operate.
7. Check for correct rotation of condenser fan and evaporator fans. Condenser air should be blowing out
from the center of the grille. Evaporator air should be blowing down through the evaporator coil. If
the fans are running backwards, the power supply phase must be changed.
Figure 21: Manual Emergency Control Connections
Replacing the EPROM Chip (MPC2000 and MP3000 Only)
To replace the EPROM chip in the controller:
1. Turn the unit On/Off switch OFF. Then unplug the unit power cord from the power supply.
2. Disconnect battery power connection from the controller (top plug on the controller).
3. Do one of the following:
• MPC2000 and MP3000 Controller: Remove the datalogger from the back of the controller by
loosening the 4 screws.
• MPC2000ID Controller: Remove the back of the controller by loosening the 4 screws.
The EPROM chip will become visible. Do NOT remove the connection between controller and
datalogger.
NOTE: An anti-static wrist strap and EPROM chip insertion tool should be used during this
procedure.
4. Cut the EPROM security strip and carefully remove EPROM chip.
WARNING: High voltage (460/380 volts)
is present on the contactors and relays in
the control box. To prevent dangerous
electrical shock, disconnect the supply
power to the unit whenever possible when
working in this area.
WARNING: High voltage (460/380 volts) is present on the contactors and relays in the control
box. To prevent dangerous electrical shock, disconnect the supply power to the unit whenever
possible when working in this area.