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Mitsubishi Electric PURY-P200 Service Handbook page 175

City multi r410a
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(3) Troubleshooting flow chart for LEV · Solenoid valve
1LEV
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
applied system (only one system).
Cooling or heating
operation
Cooling operation
Check that LEV1 is fully open.
LEV1 is fully open.
Check whether LEV3 is controlling superheat.
Superheat control OK
Check that SVA and SVC are ON.
SVA,SVC ON.
Check that SVB is OFF.
SVB OFF
Note1
NO
Heating operation
Note2
NO
YES
Note3
NO
YES
NO
YES
NO
YES
Completed
- 172 -
Fix the fault.
Check that LEV1 is fully open.
NO
LEV1 is fully open.
Check LEV1.
Check whether LEV3 is controlling
differential pressure.
NO
Differential pressure OK
Check LEV3.
Check that SVA and SVC are OFF.
NO
SVA,SVC OFF.
Check SVA
and SVC.
Check that SVB is ON.
NO
Check SVB.
Note2
YES
Note3
YES
YES
SVB ON
YES
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