[8-3 Refrigerant Control Problems ]
- 245 -
HWE14080
GB
8
Tr
oubles
hoot
ing Ba
se
d
o
n
Obs
erv
ed Sympt
o
ms
8-3
Refrigerant Control Problems
8-3-1
Units in the Cooling Mode Do Not Operate at Expected Capacity.
1. Phenomena
Although cooling operation starts with the normal remote controller display, the capacity is not enough
2. Cause, check method and remedy
Cause
Check method and remedy
1.
Compressor frequency does not rise sufficiently.
Faulty detection of pressure sensor.
Protection works and compressor frequency does
not rise due to high discharge temperature
Protection works and compressor frequency does
not rise due to high pressure
Pressure drops excessively.
(1)
Check pressure difference between the detected
pressure by the pressure sensor and the actual pres-
sure with self-diagnosis LED.
ĺ
If the accurate pressure is not detected, check the
pressure sensor.
Refer to the following page(s). [8-5-1 Comparing the
High-Pressure Sensor Measurement and Gauge
Pressure](page 253)
Note:
Lower inlet pressure by the low pressure sensor than
the actual pressure causes insufficient capacity.
SW4 setting (SW6-10: OFF)
For how to read the SW settings, refer to the follow-
ing page(s). [9-1-1 How to Read the LED](page 301)
(2)
Check temperature difference between the evaporat-
ing temperature (Te) and the target evaporating tem-
perature (Tem) with self-diagnosis LED.
Note:
Higher Te than Tem causes insufficient capacity.
SW4 setting (SW6-10: OFF)
For how to read the SW settings, refer to the follow-
ing page(s). [9-1-1 How to Read the LED](page 301)
Note:
Protection works and compressor frequency does not
rise even at higher Te than Tem due to high discharge
temperature and high pressure.
At high discharge temperature:
Refer to the following page(s).[7-3-1 Error Code
[1102]](page 158)
At high pressure:
Refer to the following page(s). [7-3-3 Error Code
[1302] (during operation)](page 160)
2.
Indoor unit LEV malfunction
Refer to the following page(s).[8-8 Troubleshooting
LEV Problems](page 258)
Insufficient refrigerant flows due to LEV malfunc-
tion (not enough opening) or protection works and
compressor frequency does not rise due to pres-
sure drop.
Refrigerant leak from LEV on the stopping unit
causes refrigerant shortage on the running unit.
High pressure sensor
Low pressure sensor
ON
SW4
1
2
3
4
5
6
7
8
9
10
OFF
ON
SW4
1
2
3
4
5
6
7
8
9
10
OFF
Evaporating temperature Te
Target evaporating temperature Tem
ON
SW4
1
2
3
4
5
6
7
8
9
10
OFF
ON
SW4
1
2
3
4
5
6
7
8
9
10
OFF
Содержание R410A
Страница 1: ......
Страница 11: ... 2 HWE14080 GB ...
Страница 25: ... 16 HWE14080 GB ...
Страница 38: ... 2 6 System Connection Example 29 HWE14080 GB 2 Restrictions ...
Страница 57: ... 2 10 Restrictions on Refrigerant Pipes 48 HWE14080 GB ...
Страница 59: ... 50 HWE14080 GB ...
Страница 71: ... 62 HWE14080 GB ...
Страница 95: ... 86 HWE14080 GB ...
Страница 121: ... 5 3 Operation Flowcharts 112 HWE14080 GB ...
Страница 123: ... 114 HWE14080 GB ...
Страница 159: ... 150 HWE14080 GB ...
Страница 243: ... 7 8 Error Code Definitions and Solutions Codes 7000 7999 234 HWE14080 GB ...
Страница 309: ... 300 HWE14080 GB ...
Страница 346: ......