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Flex + Series
23
11 Testing Board Introduction
11.1 Compose of the Testing Board
The testing board is in front of electrical box and can be observed well. It has several following
advantages: detect indoor unit numbers and indoor unit address, displays real running function and
error code automatically. It is composed of the function section, data section and button section.
11.2 Instruction of Function and Data Section
Running state The display of function section The display of data section
Stop
① The section will display the numbers of the
indoor units which have established
communication with the outdoor unit. For
example, if there are seven established indoor
units, the section will display “7”.
② It will display the address of the indoor units
by turns. For example, the “1b” is represented
of the indoor unit 1B.
(BU module:1/2/3，Indoor unit: A/b/C/d/E)
① If the function section displays the
numbers of the indoor units, the data
section will display the outside
temperature. For example, the “35” is
represented of 35℃.
② If the function section displays the
address of the indoor unit，the data
section will display the model of the
indoor unit, for example, the “35” is
represented of 35 model.
Normal
The code of running state:
Code
Running
state
Code Running state
UE
Pressure
equalization
UH Heating
UP Pump down F7 Oil returning
UC Cooling H1 Defrosting
It displays the target gear of the
compressor. If the gear is zero, it will
display “0”. For example, the gear is
the fifteenth; it will display “15”. The
range of the gear is from 0 to 60.
Malfunction
If the malfunction occurs in the system, the
section will display the error code. If there are
several malfunctions, it will display the error
codes by turns at intervals of 2 seconds.
① If the malfunction occurs in the
outdoor unit, the section displays
nothing;
② If the malfunction occurs in the
indoor units, the section displays the
address of the indoor unit.
Function section
Data section Button section
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