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Service Manual
1-81
INSTALLATION
< Judgement Result Indication >
7-segment Indication
Result
Remarks
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Refrigerant
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* Turn No.4 pin of DSW5 OFF and perform Test Run.
Excessive
Refrigerant
The refrigerant quantity is excessive.
* Calculate the additional refrigerant quantity according to the piping length. Collect
the excess refrigerant and charge with the correct amount of refrigerant.
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Refrigerant
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* Check if the additional refrigerant has been charged.
* Calculate the additional refrigerant quantity according to the piping length and
charge the refrigerant.
NOTE:
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In that case, standard additional refrigerant quantity is 1.1 lb (0.5kg) per one time.
Abnormal
Termination
Find out the cause of abnormal termination as shown below. After resolving the
cause of abnormal termination, restart the check refrigerant quantity operation.
(1) Was the No.4 pin of DSW5 ON before the power supply was turned ON?
(2) Are all indoor units ready and waiting, before the No.4 pin of DSW5 is turned ON?
(3) Was the outdoor ambient air temperature within the acceptable range (32 to
109
o
F DB (0 to 43
o
C DB)?
(In some cases, when the connected indoor unit number exceeds the
recommended number and the outdoor ambient air temperature exceeds 95
o
F
DB (35
o
C DB), this check refrigerant quantity operation cannot be performed.)
(4) Is the indoor ambient air temperature within the acceptable range (50 to 90
o
F DB
(10 to 32
o
C DB)?
(5) Is the total indoor units operation capacity ratio 30% (indoor units capacity ratio), or less?
Especially, if the indoor ambient air temperature is 15% or less, the total indoor unit
operation capacity will be 30% (indoor units capacity ratio) or less and if this is the
case, sometimes this refrigerant quantity check cannot be performed.
(6) Is switch No.4 pin of DSW4 (compressor-forced stoppage) OFF?
(1) Perform the refrigerant quantity check operation according to the automatic judgement function after
completing refrigerant charging.
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< Procedure of Refrigerant Quantity Check Operation >
(a) Reassemble all cover except for the electrical control box cover and service cover of Unit A.
(b) Turn ON the power supply of indoor unit and outdoor unit in the refrigerant cycle to perform the
refrigerant quantity check operation. (Apply power to the outdoor unit(s) at least 12 hours prior to
operation of the system for preheating of the compressor oil.)
(c) Turn ON the No.4 pin of DSW5 (PCB1).
The 7-segment display will be indicated as follows.
(d) Check the 7-segment display and press PSW1. The outdoor fan and compressor will be in standby
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The outdoor fan and compressor will activate and the 7-segment display will indicate as follows:
(2) Judgement takes 30 to 40 minutes. Refer to the table below for results.
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Содержание YVAHP072B31S
Страница 2: ......
Страница 10: ...viii Service Manual ...
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Страница 17: ...Service Manual 1 1 INSTALLATION 1 Installation ...
Страница 559: ...Service Manual 1 543 INSTALLATION 7 7RXFK DFN WR QLVK WKLV VHWWLQJ The screen returns to the Service Menu screen 7 ...
Страница 577: ...Service Manual 1 561 INSTALLATION 9 Touch Back to return to the Service Menu screen 9 ...
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Страница 921: ...Service Manual 2 1 OPERATION 2 Operation ...
Страница 983: ...Service Manual 2 63 OPERATION Clipped Ceiling Type Grille for Front Discharge 2SWLRQDO Decorative Panel 2SWLRQDO ...
Страница 1184: ...2 264 Service Manual OPERATION 7 Touch on Return to Group sel to return to Setting Group Selection 7 ...
Страница 1315: ...Service Manual 3 1 TROUBLESHOOTING 3 Troubleshooting ...
Страница 1425: ...Service Manual 3 111 TROUBLESHOOTING Surge Absorber SA Surge Absorber SA Surge Absorber SA 3RVLWLRQ RI 6XUJH EVRUEHU 9 9 1 1 1 ...
Страница 1461: ...Service Manual 4 1 MAINTENANCE 4 Maintenance ...
Страница 1657: ...Service Manual 5 1 EXTERNAL INPUT OUTPUT AND FUNCTION SETTING 5 External Input Output and Function Setting ...
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Страница 1729: ...Service Manual 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Страница 1738: ...6 10 Service Manual FIELD WORK INSTRUCTIONS 6 8 Mollier Chart for R410A ft 3 l b ...
Страница 1739: ...SERVICE PARTS LIST Service Manual 7 1 7 Service Parts List ...
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Страница 1796: ... 2015 Johnson Controls Inc SM 15001 ...