Diagnosis: Troubleshooting, Warnings and Alarm Codes
212
Head pressure too high
Refrigerant overcharge
Purge system
Air in refrigeration system
Evacuate and recharge
Dirty or restricted condenser coil
Clean condenser coil
Condenser fan not operating
See “Condenser Fan Motor Does Not
Operate” under “Mechanical
Diagnosis”
Condenser fan grille damaged or
missing
Repair or replace grille
Condenser fan blade damaged
Replace fan blade
High ambient air temperature
No remedy
Restricted dehydrator or high side
Replace filter drier or clear restriction
Defective service gauge
Replace gauge
Compressor loses oil
Refrigerant leak
Repair leak and recharge
Compressor oil migrates to
system
Short cycling
See "Unit Short Cycles" under
“Mechanical Diagnosis”
Rapid cycling between Cool,
Null and Heat modes
Air short cycling through evaporator
Check and correct cargo load
Defective controller or power module
Diagnose power module and
controller. Replace defective
component
Short cycling
See “Unit Short Cycles” under
“Mechanical Diagnosis”
Compressor Digital Control valve
stuck close or defective
Replace valve
Hot liquid line
Shortage of refrigerant
Repair or recharge
Expansion valve open too wide
Adjust or replace expansion valve
Frosted liquid line
Liquid line restricted
Remove restriction
Restricted filter drier
Replace filter drier
Frosted or sweating suction
line
Expansion valve admitting excess
refrigerant
Check feeler bulb and adjust
expansion valve
Evaporator coil needs defrosting
Check defrost circuit including
controller and evaporator coil sensor
Evaporator fan does not operate
See “Evaporator Fan Motor Does Not
Operate” under “Mechanical
Diagnosis”
Unit in vacuum—frost on
expansion valve only
Ice plugging expansion valve screen
or orifice
Apply hot wet cloth to expansion
valve. Moisture indicated by increase
in suction pressure. Replace filter
drier
High suction pressure
Overcharge of refrigerant
Purge system
Expansion valve open too much
Adjust or replace valve
Defective controller or power module
Diagnose power module and
controller. Replace defective
component
Service gauge out of calibration
Adjust or replace service gauge
Condition
Possible Cause
Remedy
Summary of Contents for 098203
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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...
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