184
Failure code
Outdoor
digital
display tube:
30-0, 1
Indoor wired
controller:
1E
Indoor unit LED status
LED5
Failure description:
High pressure switch HPS1 and HPS2 fail-
ure
20 times
Outdoor unit LED status
LED1
LED2
Normal
Normal
1. Model
Failure diagnosis and troubleshooting
MRV 5-RC series
Diagnosis
Troubleshooting
2. Abnormity detection method
◆
Check if the pressure switch
connection is normal;
◆
Check if the pressure switch
signal loop acquired by the
PCB is normal;
◆
Check if the pressure switch
is turned off usually and the
pressure exceeds 4.0MPa
when disconnection;
◆
Check if the high pressure
side of the system is blocked;
◆
Check the outdoor fan for
normal operation when cooling.
3. Abnormity confirmation
conditions
The high pressure switch is
turned off for 2s.
4. Possible causes
◆
The connection of pressure
switch is not secure;
◆
Pressure switch is broken;
◆
The pressure switch
signal acquired by the PCB is
incorrect;
◆
The high pressure side of
the unit is blocked;
◆
The outdoor fan stops
operating when cooling;
◆
The refrigerant is excessive;
◆
It is out of the operating
range of units.
Replace it correctly by after-
sales personnel on site.
Check if the corresponding connector
of pressure switch is normal
Check if the pressure switch
signal loop acquired by the
computer board is normal
Check if the high pressure reaches 4.0MPa
when the pressure switch is turned off
Check if the high pressure stop
valve is turned on or the high
pressure side is blocked
Check if it is out of the operating range of units.
Check the outdoor fan for
normal operation when cooling
Check if the refrigerant is excessive
Replace it correctly by after-
sales personnel on site.
Rectify it correctly by after-
sales personnel on site.
Rectify it correctly by after-
sales personnel on site.
Rectify it correctly by after-sales
personnel on site.
[Note] Confirm if non-condensable
gases enter the system.
Notify the user to use it within the
operating range of units by after-
sales personnel.
N
N
N
Y
Y
Y
Y
Y
N
N
Y
Y
Содержание MRV 5-RC AB052MAERA
Страница 1: ...MRV 5 RC Service Manual SYJS 03 2019REV A Edition 2019 03 ...
Страница 3: ......
Страница 55: ...52 AV08 10 12 14IMVURA 4 Center of gravity x X 347 9587 y 471 5454 z 725 6683 y z ...
Страница 56: ...53 AV16 18 20 22IMVURA x X 650 5962 y 380 7255 z 706 5342 y z ...
Страница 106: ...103 2 Dimension 4 19 200 60 25 25 25 249 108 232 84 69 388 73 82 65 103 177 4 44 4 35 277 ...
Страница 116: ...113 2 Preparation before installation ...
Страница 130: ...127 2 Dimension 290 67 410 220 567 137 160 189 57 144 109 159 159 212 393 4 22 65 65 65 65 65 44 65 76 4 52 67 156 830 ...
Страница 162: ...159 One by one valve box PCB code 0151800186A 2 Valve box PCB photo and dip switch setting ...
Страница 165: ...162 One by four valve box PCB code 0151800466 ...