Mini VRF SYSTEM
Trouble Diagnosis
3
3-43
3. Mini VRF System Alarm Codes
P13 Forgot-to-open Valve Alarm
Error Detection Method
Error Diagnosis
1.
2.
Detection is performed only in the test run. When once detected or the test run finished without any error,
the second detection will not be done.
In case of forgetting to open a valve, P04 (high-pressure switch operational alarm) is occasionally preceded due to the
following conditions.
The status of small temperature change of the oprating indoor unit continues for 3 minutes even after 5-minute to
15-minute since the cooling test run has started.
•
The status of small temperature change of the oprating indoor unit continues for 3minutes even after 7-minute to
15-minute since the heating test run has started.
•
1-1
2-1
Yes
No
1 Service
valve
Open the service
valve
2-1
2 Adjustment
to
refrigerant
change
3 Blockage
in
refrigerant
circuit
3-1
Avoid clogging
3-2
Yes
No
Are the tubes clogged?
Not additional refrigerant charged
3-1
Yes
No
Additional
refrigerant charge
3-2
3-3
Replace the
electronic control
valve
Yes
No
Is the outdoor unit’s electronic control valve operating correctly?
(Check for debris clogging the electronic control valve, a problem
with the electronical coil and/or the control PC board.)
3-3
As the second detection is not done, restart and see what happens if there is no error.
Service valve inside the outdoor unit closed
SM830209-00̲Mini̲VRF SYS.indb 43
SM830209-00̲Mini̲VRF SYS.indb 43
2012/01/11 18:25:38
2012/01/11 18:25:38
