GREE DC Inverter Side Discharge VRF Ⅱ for North America
88
Description of each stage of debugging progress
Code meaning and operation method
07_ Detect indoor
components
System detects error on indoor components. XX means the
project code of IDU with error, e.g. no.1 IDU has d5 and d6
errors, meanwhile no.3 IDU displays error d6 and d7, then the
nixie tube will display “07”, “01”, “d5”, “d6”and “03” circularly.
After errors are eliminated, system will start next step
automatically. If power is off during troubleshooting, then
restart debugging from progress 01 after power is on.
If errors occur in IDU which the project code is
≥
3-digit
number, then it will display the 2 big digits of project code first,
then the 2 small digits, finally the error code, e.g: L1 error
occurs in no.101 IDU, then the nixie tube will display “01”,“01”
and “L1” circularly. Display method is the same for several
IDUs with multiple errors.
No error on components of IDU. 5s later, next step starts.
08_ Confirm
preheated
compressor
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.
09_ Refrigerant
judgments before
startup
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.
10_ Status
judgments of
outdoor valves
before startup
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.
12_ Confirm
debugging startup
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.
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