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[
IX
Troubleshooting ]
3. Troubleshooting flow chart for LEV Solenoid valve
(1) LEV
Check whether the electric expansion
valve and the solenoid valve connector
are not disconnected or not loose.
Run the cooling operation or the heating
operation in the system in trouble
(only in one system).
No cooling capacity
No heating capacity
Repair the fault.
Fault is found.
Note 1
NO
Check that LEV1 is fully open.
Check that LEV1 is fully open.
Check that SVA and SVC are ON.
Check that SVA and SVC are OFF.
Cooling or heating operation
Note 2
Heating operation
Check whether LEV3 is controlling
superheat.
Check LEV1.
Check LEV3.
Check SVA and SVC.
Check SVB.
LEV1 is fully open.
Check whether LEV 3 is controlled by
the value of the differential pressure.
LEV1 is fully open.
Note 3
Note 2
Note 3
YES
NO
Cooling operation
Superheat control OK
Differential pressure OK
YES
NO
Check that SVB is OFF.
Check that SVB is ON.
SVA, SVC ON
SVA, SVC OFF
YES
YES
NO
Completed
SVB OFF
SVB ON
YES
YES
YES
YES
NO
NO
NO
NO
NO
Содержание PUHY-P168
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Страница 38: ... 29 II Restrictions ...
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Страница 58: ... 49 II Restrictions ...
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Страница 99: ... 90 III Outdoor Unit BC Controller Components 2 RELAY BOARD RELAY 4 board 3 RELAY BOARD RELAY 10 board ...
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Страница 126: ... 117 VI Refrigerant Circuit 1 Refrigerant Circuit Figure 119 2 Principal Parts and Functions 126 ...
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Страница 134: ... 125 VI Refrigerant Circuit 3 CMB P104 and P108NU GB sub TH25 TH22 LEV3a CP Solenoid valves Block Check valves Block ...
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Страница 366: ... 357 IX Troubleshooting ...
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Страница 368: ... 359 X LED monitor display on the outdoor unit board 1 How to read the LED on the service monitor 361 ...
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