Mini VRF SYSTEM
Trouble Diagnosis
3
3-29
3. Mini VRF System Alarm Codes
F16 High Pressure Sensor Error
Error Detection Method
1.
Error Diagnosis
2.
Sensor connector is connected to control PC board properly.
1-1
1-2
Reconnect and check
Yes
No
Correct
2-2
Yes
No
1 Sensor
2
3 Control PC
board
Operating
status
Forgot to open the service valve
2-1
Adjust the amount
of refrigerant
2-2
Yes
No
Tends to have insufficient refrigerant charge in the system.
2-2
Avoid clogging
3-1
Yes
No
Replace control PC
board
Replace sensor
Yes
No
Are the tubes clogged?
The difference between the value of actual high pressure and
that of detect pressure will roughly indicate as shown below.
Judgement criteria
At time of outdoor
temperature lower than 20
°C
Difference of roughly
over 0.2MPa
When measuring the value of actual high pressure, connect
the measuring gauge to the high pressure outlet port and
measure it.
The detect pressure value is the pressure value indicated
by the monitoring software display.
2-3
3-1
Is sensor resistance value in normal?
Disconnect the connector and measure the resistance value
between each wire of sensor.
Correct reference values:
between 1-2: 8.5
ｋ
ohm, 1-3: 1.0
ｋ
ohm, 2-3: 8.5
ｋ
ohm
1-2
2-1
Replace sensor
Yes
No
It is judged an error based on the criteria listed below.
Cooling:
Heating:
Status of lower 5°C saturated temperature under the detect pressure compared to the outdoor heat exchanger
liquid temperature (C1 temp.) was continuosly detected for 30 minutes.
Status of lower 5°C saturated temperature under the detect pressure compared to the highest E1 temperature
in the indoor unit was continuously detected for 30 minutes.
•
•
Open circuit or Short circuit
•
At time of outdoor
temperature higher than 20
°C
Difference of roughly
over 0.4MPa
SM830209-00̲Mini̲VRF SYS.indb 29
SM830209-00̲Mini̲VRF SYS.indb 29
2012/01/11 18:25:12
2012/01/11 18:25:12
