Airwell SX 12 DCI, Service Manual

Page: 61 / 86

CONTROL SYSTEM
11-20
SM YAZ318 1-A.1 GB
How to interpret the results (pf sub menu):
Test Result (pf) Interpretation
NUL
The test has never been done before.
PAS
The test is pass
FAL
The test is fail
OAT
Outdoor air temperature is lower than 5 degrees. The installation
test cannot be done.
IDU
The selected number of the installed indoor units by the
technician does not match the number of indoor units detected
by the system.
FLT
IDU or ODU fault
11.6.7 Matrix Table Test Result (tbl) & Problem Correction (Crt)
The technician has to use labels on the indoor wires connected to the outdoor
On unit Label
C
A
C
B
（
C
C
） （
C
D
）
x=Wire name
(Marked by technician)
1 2 3 4
For non connected indoor units, there is no need for label.
The result is presented in the following way:
Present for 2
sec
Present for 2 Sec. Interpretation
x--: Cz
‘x’
is the wire name (1,2,3,4)
‘z’
is the communication channel (A,b,c,d)
‘x--:Cz’
is move wire ‘x’ to communication
channel Cz
Ey-: W
‘y’
is the EEV channel name (A,b,c,d)
‘w’
can be:
1. ‘c’ is closed
2. ‘o’ is open
3. ‘oc’ is either close or open.
x--: C_
‘x’
is the wire name (1,2,3,4)
‘C_’
is unknown communication channel.
‘x--:C_’
is the system does not know where
to move wire ‘x’.
Possible reasons for ‘o’ and ‘c’:
Term Possible reasons
‘c’ •
Clogged EEV
•
EEV Coil problem
•
EEV driver problem
•
Clogged indoor unit or part of it.
•
Problem in ICT sensor
•
Extremely high load at the indoor side
‘o’ •
Valve always open
•
EEV coil problem
•
Driver Problem