SM-16007
3-117
TROUBLESHOOTING
3.4.4 Checklist for Refrigerant System
NOTE:
The symbol with an underline indicates an item to check.
(1) General
No.
Check Item
Result
1
<Combination of Base Units>
Is DSW6 setting for outdoor unit No. correct?
2
Are the power source wire and the communication wire separate
from refrigerant pipings?
3
Is a ground wire connected?
4
Is there any short circuit?
5
Is there any voltage abnormality among each phase?
(L1-L2, L2-L3, L3-L1)
(2) Refrigerant System
a. Operation (Cooling/Heating)
No.
Check Item
Result
1
Operate all the units (“TEST RUN” mode).
2
Operate all the indoor units at “HIGH” speed.
3
In an instance where the constant compressor is turned ON and
OFF repeatedly, switch off an indoor unit with a small capacity.
b. Sampling Data (Cooling/Heating, Indoor Temperature 70
o
F~86
o
F (21
o
C~30
o
C))
No.
Check Item
Result
1
Check the operating data after 20-minute operation.
2
Check Pd and Td. Is Td-SH 59 to 113
o
F (15 to 45
o
C) ?
3
Is Ps 22 to 189 psi (0.15 to 1.3 MPa) ?
4
Is Pd 145 to 522 psi (1.0 to 3.6 MPa) ?
(If the outdoor temperature is high, Pd becomes high.)
I.U.
Model
I.U.
Serial No.
I.U.: Indoor Unit,
O.U.: Outdoor Unit
Piping
Length:
feet
Additional
Refrigerant
Charge:
lb
CHECKLIST FOR TEST OPERATION
CLIENT:
INSTALLER:
DATE:
O.U.
MODEL:
O.U.
SERIAL
NO.:
CHECKER:
The system data can be checked on the 7-segment display of the outdoor unit PCB during the test run
and the troubleshooting. However, it may take time for checking because the operation cycle changes
depending on the operating condition.
To check the quality of the refrigerant system, the following checklist shall be used at the test run,
troubleshooting, and emergency check.
(1) Refrigerant System Check
The most important thing for the refrigerant system is to check that each expansion valve opening and
WKHRSHUDWLQJIUHTXHQF\LVZLWKLQWKHVSHFL¿HGUDQJH(DFKLWHPYDULHVLQWKHYDOXHGHSHQGLQJRQWKH
operating frequency, indoor temperature and ambient temperature.
(2) The service system tester, which automatically calculates Td and SH, facilitates the refrigerant system
check. If possible, record the operating cycle data using the service system tester.
Summary of Contents for YVAHP0721CW Series
Page 2: ......
Page 10: ...viii SM 16007 ...
Page 14: ......
Page 15: ...SM 16007 1 1 INSTALLATION 1 Installation ...
Page 163: ...SM 16007 2 1 OPERATION 2 Operation ...
Page 164: ...2 2 SM 16007 OPERATION Ɣ 5HIHU WR WKH 6HUYLFH 0DQXDO IRU QGRRU 8QLW RU RQWUROOHU ...
Page 165: ...SM 16007 3 1 TROUBLESHOOTING 3 Troubleshooting ...
Page 284: ......
Page 285: ...SM 16007 4 1 MAINTENANCE 4 Maintenance ...
Page 360: ......
Page 390: ......
Page 391: ...SM 16007 6 1 FIELD WORK INSTRUCTIONS 6 Field Work Instructions ...
Page 400: ...6 10 SM 16007 FIELD WORK INSTRUCTIONS 0ROOLHU KDUW IRU 5 ft 3 l b ...
Page 401: ...SERVICE PARTS LIST SM 16007 7 1 7 Service Parts List ...
Page 416: ... 2016 Johnson Controls Inc SM 16007 Code No LIT 12012400 Issued November 2016 ...