MP-3000a Controller
108
Code
Description
Corrective Action
06*
Compressor Current Too High (Check Alarm
• Occurs during Pretrip (PTI) or Function test only.
• Compressor power consumption is 25% above
expected current draw (above approximately 13
amps); or compressor phase current level
difference of 10% or more, depending on
ambient temperature.
• Indicates:
• Defective KVQ valve
• Defective compressor or valve plate
• Defective volt or amp meter on relay board
• Inaccurate ambient, condenser or evaporator
temperature measurement
• Out of range power supply
• Excessive condenser pressure due to air or
wrong refrigerant in system, or refrigerant over
charge
• Check evaporator, condenser and ambient
sensor temperatures for correct value (+/-C
[+/-9F] by viewing Data menu.
• Enter Manual Function Test menu. Start and
check current draw of the following components
separately and together: compressor,
compressor 100%, condenser fan and
evaporator fan (high and low).
• Check volt and ampere meter.
• Check power supply volts.
07*
Compressor Current Too Low (Check Alarm)
• Occurs during Pretrip (PTI) or Function test only.
• Compressor power consumption is 25% below
expected current draw (below approximately 9
amps).
• Indicates:
• Defective or open fuse CB 7A, high pressure
cutout switch or connection in plug j19
between pins 7 & 8
• No signal on plug J11 on pin 8
• Defective compressor relay
• Defective volt or amp meter on relay board
• Low refrigerant charge
• Defective compressor or valve plate
• Enter Manual Function Test menu. Start and
check current draw of the following components
separately and together: compressor,
compressor 25%, condenser fan and evaporator
fan (high and low). If relay does NOT energize
and the LED above the compressor relay is NOT
ON, check for a defective cable No.2, main relay
board or controller.
• Check discharge and suction pressure gauge
readings. Evaluate readings based on current
cargo and ambient temperatures.
• Check volt and ampere meter.
• Check power supply volts.
NOTE: *If both alarms 06 and 07 are activated, the alarms are caused by a large difference in
measured amps. Enter Function Test and start condenser fan, compressor, compressor 100% and
evaporator fans on HIGH speed. Check the amps measurements. if necessary, check the resistance of
the motor windings.
10*
Heater Current Too High (Check Alarm)
• Occurs during Pretrip (PTI) or Function Test.
• Heater power consumption is 25% above
expected current draw (above approximately 4.4
amps and 5.1 amps, depending on voltage).
• Indicates:
• Incorrect heaters or heater connections
• Defective volt or amp meter on relay board
• Defective heater element
• Enter Manual Function Test and turn heaters ON.
Check current draw on each phase. Current
draw should be about 4.4 amps on each phase
at 400V (5.1 amps at 460V).
• Check heater resistance between H1 and H2, H2
and H3, and H1 and H3. Resistance should be
about 99 ohms on each leg.
Содержание CRR-40 119
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Страница 16: ...Safety Precautions 16...
Страница 18: ...Service Guide 18...
Страница 20: ...Model Features 20...
Страница 32: ...Specifications 32...
Страница 120: ...MP 3000a Controller 120...
Страница 160: ...Wiring and Schematic Diagrams Index 160...
Страница 161: ...161 MPC2000 Wiring Schematic...
Страница 162: ...162 MPC2000 High Voltage Wiring Diagram...
Страница 163: ...163 MPC2000 Low Voltage Wiring Diagram...
Страница 164: ...164 MPC2000 WCC Wiring Schematic...