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——
Progress
09_ Refrigerant
judgments before
startup
10_ Status
judgments of
outdoor valves
before startup
12_ Confirm
debugging startup
15_ Cooling
debugging
15/error code
16_ Heating
debugging(For
heat pump units
only)
16/error code
17_ Debugging
finished
Description of each stage of debugging progress
Debugging code
LED
Code
Display status
Display
09/U4
circularly
Display
09/oC
circularly
Display
10/on
circularly
Display
10/U6
circularly
Display
10/oC
circularly
Display
12/AP
circularly
Display
12/AE
circularly
Display
15/AC
circularly
Display
circularly
Display
16/AH
circularly
Display
circularly
oF
ON
Code meaning and operation method
System is lack of refrigerant and display will be as in the
left. Please cut off power of IDU and ODU and check if
there is leakage on pipeline. Solve the leakage problem
and complement refrigerant into the unit. Then connect
power and restart debugging from progress 01 (Note:
Before re-charging refrigerant, unit must be power off in
case system starts progress 10 automatically).
Refrigerant is normal and unit will display as in the left for
2s.Then next step starts.
Valves of ODU are being inspected. Compressor will start
operation for 2min or so and then stop. The opening and
closing status of outdoor valves are as below:
Outdoor valves are not fully turned on. Press main board's
SW4 button and display shows "09/OC". Then check if the
gas and liquid valves of ODU are completely open. After
confirmation, press the SW4 button again. Then
compressor will start running for about 2min to inspect the
status of valves.
Valves status is normal. Unit will display as in the left for 2s
and then start next step.
Ready for units to start debugging. Press main board's
SW3 button to confirm startup of debugging. 2s later, main
board will display as below:
Startup is confirmed. After displaying for 2s, system will
choose "15_Cooling debugging" or "16_Heating
debugging" according to ambient temperature. If the
project requests to add refrigerant but it is not
complemented before debugging, then refrigerant can be
added in this process through the L-VALVE.
Debugging for cooling mode. If no malfunction occurs for
50min when compressor is running, then the system is
certified as normal. After shutting down the unit for 5s, the
system will enter normal standby status.
Malfunction occurs when debugging for cooling mode.
Debugging for heating mode. If no malfunction occurs for
50min when compressor is running, then the system is
certified as normal. After shutting down the unit for 5s, the
system will enter normal standby status.
Malfunction occurs when debugging for heating mode.
The entire unit has finished debugging and under
standby-by condition.
24
DC Inverter Multi VRF System
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