Airwell YAZE218, Service Manual

Page: 49 / 78

11—18 | SM YAZE218 1-A.2 GB
11—CONTROL SYSTEM
11.6 Installation Test Mode
11.6.1 Test Objectives
● Find tube-communication wires mismatch.
● Instruct the technician to match the tubes to the communication wires.
● Find EEV or tubing problems.
11.6.2 Test Concept
● The unit will open each EEV separately in cooling mode.
● Detect a temperature drop on the indoor unit.
●
Based on the temperature drop, the system can match the tube to the indoor
unit.
11.6.3 Test Rules
Before starting the installation/technician test, make sure for the following:
1. No indoor communication channel is connected to non existing tube channel.
2. The number of the connected/installed indoor unit is set properly.
3. All the EEVs are connected properly to the right EEV channels.
4. No mix between the indoor unit’s tubes, each indoor unit must have its own
tubes connected properly to the outdoor unit.
If the rules above are not respected, the test results will make no sense.
11.6.4 Installation test menu
11.6.5 How to do installation test
1. While the power is off, set the following labels on the wires:
On unit Label C
A
C
B
(C
C
) (C
D
)
Wire name
(Marked by technician)
1 2 3 4
For non connected indoor units, there is no need for label.
2. Set the number of the connected/installed indoor units.
Elect ‘nID’ number under ‘it’, the selected number blinks. The factory setting value is 4.
3. Enter installation test (by either of the following):
a. Select ‘bgn’ under ‘it’ menu.
b. According to the following: