Airwell YAZE218, Service Manual

Page: 52 / 78

SM YAZE218 1-A.2 GB | 11—21
11—CONTROL SYSTEM
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 communica-
tion 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’:
s n o s a e r e l b i s s o P m r e T
‘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