MP-3000 Controller
101
• Position 4: Not Used
• Position 5: Defrost: Heaters are activated
(evaporator fans off).
• Position 6: Heat: Evaporator fans operate at
high speed to introduce fan motor heat only
into the container (no electric heater
operation).
To select Manual Control:
1. Turn the U
NIT ON/OFF switch to OFF.
2. Turn the unit 460/380V main circuit breaker
off. Then disconnect the unit power cord from
the power supply.
Figure 32: Manual Emergency Control Connections
3. Disconnect cable No. 2 from the controller
and main relay board (see electrical
schematic). The main relay board will now
control the unit based on the manual control
setting.
NOTE: MUST check 2-pin plug location on
J501 connections of main relay board to
ensure correct unit operation.
4. If necessary, remove 2-pin plug from J501
(see decal on main relay board) and relocate
based on the unit operating mode required.
5. Connect the unit power cord to the proper
power supply.
6. Start the unit by turning the unit 460/380V
main circuit breaker on.
NOTE: On CSR units, both the 460/380V
main circuit breaker and the U
NIT ON/OFF
switch must be used to cycle the unit on and
off. The U
NIT ON/OFF switch must be ON to
operate the scroll compressor.
7. Check for correct rotation of condenser fan.
Condenser air should be blowing out from the
center of the grille. If the fan is running
backwards, power supply phase must be
changed.
CAUTION: The unit must be cycled on
and off manually to maintain the desired
temperature. Use the 460/380V main
circuit breaker to start and stop the unit.
Monitor container temperature with an
external thermometer.
WARNING: The unit will automatically
start and operate if 460/380V power is
present at the main relay board when the
controller is disconnected. To prevent
personal injury from rotating machinery
or dangerous electrical shock from high
voltage controls, disconnect the supply
power to the unit before preparing the unit
for manual emergency mode operation.
AXA0170
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