Table of Contents
[8-9 Troubleshooting Problems with Major Components on Hydro unit ]
8-9-3
Troubleshooting Flowchart for LEV and Solenoid Valves
(1) LEV
No cooling capacity
No heating capacity
Check whether the electric expansion
valve and the solenoid valve connector
are not disconnected or not loose.
Fault is found.
Run the cooling operation or the heating
operation in the system in trouble
(only in one system).
Cooling or Heating
Cooling
Check that SV1 is ON.
SV1 ON
YES
Check that LEV1 is
controlling the superheat.
Superheat control OK
YES
BS_08_E
NO
Repair the fault.
Heating
NO
Note 1
NO
Check LEV1.
Completed
NO
Check SV1.
NO
Check that SV1 is OFF.
SV1 OFF
YES
Note 1
Subcool control OK
YES
chapter 8 -
37
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