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MP-3000a Controller
70
•
Shutdown Alarm (Level 1): Alarm LED
flashes and unit stops. Shutdown alarms
indicate the unit has been stopped to prevent
damage to the unit or cargo. The condition
must be corrected before restarting the unit.
Alarm code 56 (compressor temperature too
high) is a shutdown alarm.
•
Check Alarm (Level 2): Alarm LED flashes
until alarm is acknowledged. Check alarms
indicate corrective action should be taken
before a problem becomes severe.
Figure 18: Alarms Menu Screen Flow Diagram
Alarm Code States
There are three alarm code states for Shutdown
and Check alarms:
•
NOT ACTIVE: An alarm condition has
occurred but no longer exists in the unit. Not
Active means the condition was corrected and
did not recur for 1 hour; or the unit On/Off
switch was turned OFF and then ON.
- When a NOT ACTIVE alarm code is
acknowledged (F4 key pressed while alarm
code appears in LCD display), the Alarm LED
will turn OFF and the alarm code disappears
from the alarm list.
•
ACTIVE: An alarm condition has occurred
and continues to exist in the unit; or the alarm
condition occurred within the past 1 hour but
does not currently exist in the unit.
- If alarm condition currently exists in the unit
and the alarm code is acknowledged, the
Alarm LED will stop flashing but remain ON.
The alarm code state will change to
ACKNOWLEDGE in the alarm list.
- If the alarm condition no longer exists in the
unit and the alarm code is acknowledged, the
Alarm LED will turn OFF and the alarm code
disappears from the alarm list.
•
ACKNOWLEDGE: An alarm code has been
viewed and acknowledged in alarm list. The
Alarm LED remains ON but does not flash.
- If the alarm condition is corrected, the Alarm
LED will turn OFF and the alarm code
disappears from the alarm list.
Viewing the Alarm List Menu
With the unit On/Off switch ON and the LCD
display showing the standard display (setpoint):
1. Press F2 key to directly enter Alarms menu.
The first alarm code number, alarm state and
alarm description appears in LCD display.
NOTE: Alarm codes are displayed in
sequential order, not in the order of
occurrence.
2. Write down the first alarm code. Then press
F2 key to view the next alarm code when
more than one alarm code has been recorded.
3. Repeat step 4 until all alarm codes have been
recorded. To scroll backward to return to a
previous alarm code, press F3 key.
4. To clear all alarm codes from the current
display list and turn off the Alarm LED, all
problems must be corrected and the alarm
code “acknowledged” in the Alarm List menu.
NOTE: To acknowledge an alarm, press F4
while the alarm code appears on the screen. The
alarm state will change from ACTIVE or NOT
ACTIVE to ACKNOWLEDGE.
NOTE: If no key is pressed for 30 seconds, the
controller returns to previous menu level or LCD
Standard Display.
AJA1424
Summary of Contents for CRR-40 119
Page 4: ......
Page 16: ...Safety Precautions 16...
Page 18: ...Service Guide 18...
Page 20: ...Model Features 20...
Page 32: ...Specifications 32...
Page 120: ...MP 3000a Controller 120...
Page 160: ...Wiring and Schematic Diagrams Index 160...
Page 161: ...161 MPC2000 Wiring Schematic...
Page 162: ...162 MPC2000 High Voltage Wiring Diagram...
Page 163: ...163 MPC2000 Low Voltage Wiring Diagram...
Page 164: ...164 MPC2000 WCC Wiring Schematic...