D.C. Inverter Multi VRF Modular
50
No error in outdoor components. Start
next progress.
07_Detect indoor
components
System detects error in indoor
components. XXXX is the project no. of
the faulted IDU. 3s later, relevant error
code is displayed. For example, IDU no.
100 has d5 error, then LED3 displays like
this: 01 (2s later) 00 (2s later) d5, and
repeat again.
No error in indoor components. Start
next progress.
08_Confirm
preheated
compressor
Preheat time for compressor is less than
8h.
Preheat time for compressor is 8h. Start
next progress.
09_Refrigerant
judgments
before startup
System refrigerant is not enough.
System downtime equilibrium pressure is
lower than 0.3MPa.
System refrigerant is normal. Start next
progress.
10_Status
judgments of
outdoor valves
before startup
Outdoor valves are being turned on.
Outdoor valves are not fully turned on.
Outdoor valves are turned on normally.
Description of each stage of debugging progress
11_Calculate
refrigerant
quantity
manually
Calculate the refrigerant quantity
manually and confirm the perfusion
status of refrigerant (the quantity of
refrigerant added into the system must
be recorded accurately).
12_Confirm
debugging
startup
Ready for units to start debugging.
Manual calculation of refrigerant quantity
is set up.
Debugging is enabled in cooling mode
(debugging mode, auto-selected by
system).
Error occurs during debugging in cooling
mode.
Error of other modules occurs during
debugging in cooling mode.
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