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YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
TESTING BOARD INTRODUCTION
INSTRUCTION OF FUNCTION AND DATA SECTION
Running state
The display of function section
The display of data section
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:1/2/3/4, Indoor unit: A/B/C)
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
O
95 F.
2) If the function section displays the address of the
indoor unit, the data section will display the capacity
of the indoor unit, for example, the "35" is represented
of 3500W.
Stop
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.
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.
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.
Normal
Malfunction
The code of running state:
Code
Running state
Running state
UE
Pressure equalization
Heating
UP
Pump down
Oil returning
UC
Cooling
Code
UH
F7
H1
Defrosting
TROUBLESHOOTING
* In the event of abnormal conditions (like, stinky smell), please shut off the power supply immediately and then
contact the appointed service center; otherwise, the abnormal running would damage the air conditioner and
also would cause electric shock or fire hazard.
* Do not repair the air conditioning personally but instead contact the professionally skilled personnel at the
appointed service center, as the incorrect repair would cause electric shock or fire hazard etc.
If the air conditioner still runs abnormally after the above check and handling, please contact the local appointed
service center and also give a description of the error occurred as well as the model of the unit.
CHECK BEFORE CONTACTING SERVICE CENTER
Please check the following items before contacting the maintenance serviceman.
Conditions
Causes
Corrective actions
Broken fuse or breaker is off
Replace the damaged fuse or close the breaker
Power off
Restart the unit after power supply resumes
Power supply plug is loose
Plug the power supply properly
The batteries voltage of the remote controller is insufficient
Replace with new batteries
The unit does
not run at all
Remote controller is out of the control scope
The distance shall be within 8m
The unit stops soon
after it starts
Air inlet or outlet of indoor unit or outdoor unit is blocked
Remove the obstacles
Air inlet or outlet of indoor unit or outdoor unit is blocked
Remove the obstacles
Temperature setting is improper
Adjust the setting of remote controller or wire controller
Air speed is set too low
Adjust the setting of remote controller or wire controller
Improper airflow direction
Adjust the setting of remote controller or wire controller
Door or window is open
Close the door or window
Under direct sunshine
Hang curtain or blinders over the window
Too many people in the room
Too many heat sources indoors
Reduce the heat sources
Cooling or heating
is abnormal
The filter screen is dirt or blocked
Clean the filter screen
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YMGI, Engineered Comfort Products for A Sustainable and Efficient Green World !
TEST OPERATION
CHECK AFTER INSTALLATION
1) Before test operation
* The appearance of the unit and the refrigerant pipes cannot be damaged during the installation.
* Do not switch on power before installation is complete.
* Electrical wiring must be connected correctly and securely.
* The stop valves of the outdoor unit should be opened fully.
* All the
debris
such as scraps and thrums must be cleared from the unit.
2) Test operation method
* Test operation should be carried out by the
licensed
professional personnel
while
on the premis
es
so
that all items
listed above are in normal conditions.
* Set the status of the power supply switch as "ON" eight hours before the start of operation
* Press mode button, to select the COOL, HEAT, FAN. Whether the air conditioner will work normally or not.
* The fan motor of the indoor unit will run automatically in one minute.
* The fan motor and compressor of the outdoor unit will run automatically in one minute.
If the unit cannot work or has any abnormal noise after the compressor is started, turn off the unit for an
immediate check.
Items to be checked
Possible malfunction
Has it been fixed reliable?
The unit may drop, vibrate or make noise.
Has the gas leakage been checked?
It may cause insufficient cooling(heating) capacity.
Is the thermal insulation of the unit sufficient?
It may cause condensation and dripping.
Is the drainage well?
It may cause condensation and dripping.
Is the voltage in accordance with the rated voltage
marked on the nameplate?
It may cause electric malfunction or the
components may be burned out.
Are the lines and pipelines correctly installed?
It may cause electric malfunction or the
components may be burned out.
Has the unit been safely grounded?
It may cause electrical leakage.
Are the models of lines in conformity with requirements?
It may cause electric malfunction or the
components may be burned out.
Are there any obstacles near the air inlet and outlet
of the indoor and outdoor units?
It may cause insufficient cooling(heating) capacity.
Have the length of connection pipes and
refrigerant charge amount been recorded?
It is not easy to decide the charge amount of refrigerant.
TEST OPERATION
TESTING BOARD INTRODUCTION
COMPOSE OF THE TESTING BOARD
The testing board is composed of the
function section, data section and button
section.
Function section
Data section
Button section
SW1 SW2 SW3 SW4 SW5
UNIT OPERA
TION
UNIT OPERA
TION
