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Diagnosis: Troubleshooting, Warnings and Alarm Codes
234
20
Defrost Time Too Long
• May occur during any defrost.
• Heat signal has been on for too long.
• Time limit is 90 minutes with supply voltage above
440VAC and 120 minutes below 440VAC.
• Indicates:
• Low power supply voltage.
• Defective heater elements.
• Evaporator fans running during defrost.
• Evaporator sensor placed wrong.
• Initiate a manual defrost and check amperage
draw and evaporator coil temperature.
Evaluate defrost performance.
• Open evaporator door and check location of
evaporator coil sensor.
NOTE: This alarm can be activated at low
voltage and very low box temperature
conditions, even under normal operating
conditions.
22
Capacity Test 1 Error
• Occurs during pretrip (PTI) test only.
• Difference between supply and return air
temperature is too small with high speed
evaporator fans (less than approximately 4.5 C [8
F]).
• When the return air temperature does not reach
-18 C (0 F) within preset time.
• Indicates:
• Incorrect location of supply or return air sensor.
• Air leakage at supply sensor cable.
• Defective supply or return air sensor.
• Interchanged sensor connections.
• Incorrect evaporator fan rotation or high speed
operation.
• Incorrect refrigeration system operation.
• Container/side panels defective, damaged or
leaking.
• Economizer circuit defective.
• Enter Manual Function Test and start
evaporator fans on high speed and let operate
fans for 5 minutes. Check supply, return and
evaporator coil (defrost) sensor temperatures.
Sensor readings should be the same
(evaporator coil may be 0.5 C [1.0 F] lower
due to fan motor heat).
• Open evaporator door and inspect evaporator
fan rotation. Make sure fans are rotating
correctly on high speed.
• Check the sensor connections.
• Enter Manual Function Test menu. Start and
check current draw of the following
components separately and together:
compressor, vapor on, condenser fan and
evaporator fans (high). Check discharge and
suction pressure readings. Also check the
refrigerant charge.
NOTE: This alarm can be activated in
ambient temperatures below -10 C (14 F),
even under normal conditions.
Alarm Codes, Descriptions and Corrective Actions (Continued)
Code
Description
Corrective Action
Содержание 098203
Страница 2: ......
Страница 3: ...MAGNUM TK 60275 4 MM Rev 3 08 15 Copyright 2012 Ingersoll Rand EMEIA Printed in Ireland...
Страница 193: ...Refrigeration Maintenance 191 Figure 163 Filter Drier...
Страница 200: ...Refrigeration Maintenance 198 Figure 169 Receiver Tank Figure 170 Water Cooled Condenser Tank...
Страница 257: ...255 Schematic Diagram RELEASED 19 Sep 2013...
Страница 258: ...256 Wiring Diagram Page 1 of 2 RELEASED 19 Sep 2013...
Страница 259: ...257 Wiring Diagram Page 2 of 2 RELEASED 19 Sep 2013...
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