Testing Board Introduction; Compose Of Testing Board; Instruction Of Function And Data Section - Gree KM48H4O Service Manual

Super Free Match
Service Manual
MAINTENANCE

1 Testing Board Introduction

1.1 Compose of 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.

1.2 Instruction of Function and Data Section

Running state
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
Stop 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)
Normal
will display the error code. If there are several
Malfunction
malfunctions, it will display the error codes by turns
intervals of 2 seconds.
MAINTENANCE
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The display of function section
The code of running state:
Running
Code Code
state
Pressure
UE UH
equalization
UP Pump down F7
UC Cooling H1
If the malfunction occurs in the system, the section
① If the function section displays the
numbers of the indoor units, the data
section
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.
It displays the target gear of the
Running state
compressor. If the gear is zero, it will
display "0". For example, the gear is the
Heating fifteenth; it will display "15". The range of
the gear is from 0 to 60.
Oil returning
Defrosting
①
outdoor unit, the section displays nothing;
② If the malfunction occurs in the indoor
at
units, the section displays the address of
the indoor unit.
The display of data section
will display the
If the malfunction occurs in the
outside