Bosch R32 - Page 42

42 CLIMATE 5000 RAC SINGLE SPLIT (R32) – 6720894076 (2019/08)
Troubleshooting
2.Field Maintenance Refrigerant Circuit Others
Possible causes of trouble
Dirty evaporator coil Insufficient air through evaporator coil Overcharge of refrigerant Dirty or partially blocked condenser Air in refrigerant cycle Air flow circulation not correct High temperature at condenser Insufficient condens flow Broken compressor internal parts Inefficient compressor Expansion valve obstructed Expansion valve or capillary tube stucked Leaking power element on expansion valve Poor installation of feeler bulb Insufficient cooling load Loosen bolts or screws Packing rest in the unit Poor capacity Contact with other components like pipe or plate
Unit will not start
Compressor does not start - Only fan runs
Compressor and condenser (outdoor) fan will
not start
Evaporator (indoor) fan will not start
Condenser (Outdoor) fan will not start
Unit runs, but shortly stops
✩ ✩ ✩ ✩
Compressor short-cycles due to overload
✩ ✩
High discharge pressure
✩ ✩ ✩ ✩ ✩ ✩
Low discharge pressure
✩
High suction pressure
✩ ✩ ✩ ✩
Low suction pressure
✩ ✩ ✩ ✩ ✩
Unit runs continuously but insufficient cooling
✩ ✩ ✩ ✩ ✩ ✩ ✩ ✩
Too cool
Compressor is noisy
✩ ✩ ✩ ✩ ✩
Horizontal louver can not revolve
Test method / remedy
Clean coil Check fan Change charged refrigerant volume Clean condenser or remove obstacle Purge, evacuate and recharge Check the air flow for obstacles Check the air flow for obstacles Check the drain pipe Check the compressor and replace if defect Check the compressor operation Check the expansion valve and replace if defect Check the expansion valve and replace if defect Check the expansion valve and replace if defect Fix feeler bulb Check the heat calculation Tighten bolts or screws Remove packing material Check the building load calculation Check if the compressor is touching another component and correct
Table 16.