Lennox VEPS075N432K User Manual page 32

——
Progress
08_ Confirm
preheated
compressor
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
08/U0
circularly
Display
08/oC
circularly
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
Preheat time for compressor is less than 8 hours. Display will
be as in the left until the preheat time reaches 8 hours. Press
main board's SW3 button to confirm manually that the preheat
time has reached 8 hours. Then start next step (Note:
Compressor may get damaged if it is started without 8 hours
of preheat time).
Compressor has been preheated for 8 hours. 2s later, next
step starts.
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.
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DC Inverter Multi VRF System