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Diagnosis: Troubleshooting, Warnings and Alarm Codes
231
13
Evaporator Fan High Speed Current Too Low
• Occurs during pretrip (PTI) or function test only.
• Fan power consumption is 33% below expected
current draw or phase current level differs 33% or
more.
• If both alarm #12 and #13 is active this indicates
too high phase difference.
• Expected fan current is a function of the power line
frequency and the supply voltage.
• With 20’ setting below approximately
-
1,4Amp@400VAC/50Hz
-
2,0Amp@460VAC/60Hz
• With 40’ setting below approximately
-
0,9Amp@400VAC/50Hz
-
1,4Amp@460VAC/60Hz
• Indicates:
• Defective or open fan motor internal over
temperature protection switch.
• Incorrect motor or motor connections.
• Defective volt or amp meter on power module.
• Open evaporator door and make sure all fans
rotate freely.
• Enter Manual Function Test and start
evaporator fans on high speed. Make sure all
fans start on high speed. If a motor does not
start and is very hot, wait 10 minutes for
internal over temperature switch to close.
• Enter Manual Function Test and start
evaporator fans on high speed. Make sure all
fans start on high speed. Check fan motor
volts and amps.
• With 20’ setting expect
-
2,4Amp@400VAC/50Hz
-
3,1Amp@460VAC/60Hz
• With 40’ setting expect
-
1,8Amp@400VAC/50Hz
-
2,4Amp@460VAC/60Hz
14
Evaporator Fan Low Speed Current Too High
• Occurs during pretrip (PTI) or function test only.
• Fan power consumption is 33% above expected
current draw or phase current level differs 33% or
more.
• If both alarm #14 and #15 is active this indicates
too high phase difference.
• Expected fan current is a function of the power line
frequency and the supply voltage.
• With 20’ setting above approximately
-
1,0Amp@400VAC/50Hz
-
1,2Amp@460VAC/60Hz
• With 40’ setting above approximately
-
1,0Amp@400VAC/50Hz
-
1,2Amp@460VAC/60Hz
• Indicates:
• Defective or stuck evaporator fan motor.
• Incorrect motor or motor connections.
• Defective volt or amp meter on power module.
• Open evaporator door and make sure all fans
rotate freely.
• Enter Manual Function Test and start
evaporator fans on Low speed. Make sure all
fans start on low speed. Check fan motor volts
and amps.
• With 20’ setting expect
-
0,8Amp@400VAC/50Hz
0,9Amp@460VAC/60Hz
• With 40’ setting expect
-
0,8Amp@400VAC/50Hz
-
0,9Amp@460VAC/60Hz
Alarm Codes, Descriptions and Corrective Actions (Continued)
Code
Description
Corrective Action
Summary of Contents for 098203
Page 2: ......
Page 3: ...MAGNUM TK 60275 4 MM Rev 3 08 15 Copyright 2012 Ingersoll Rand EMEIA Printed in Ireland...
Page 193: ...Refrigeration Maintenance 191 Figure 163 Filter Drier...
Page 200: ...Refrigeration Maintenance 198 Figure 169 Receiver Tank Figure 170 Water Cooled Condenser Tank...
Page 257: ...255 Schematic Diagram RELEASED 19 Sep 2013...
Page 258: ...256 Wiring Diagram Page 1 of 2 RELEASED 19 Sep 2013...
Page 259: ...257 Wiring Diagram Page 2 of 2 RELEASED 19 Sep 2013...
Page 263: ......