Gree GC201808-III, Руководство по обслуживанию

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GREE GMV5 HR HEAT RECOVERY UNITS
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pressure sensor. If the parameter is abnormal, it will indicate that confirming the open of cut-off valve and
then press SW5 to enter the next step after confirming.
Possible reason:
■ODU cut-off valve is not opened;
Troubleshooting:
Confirm again and open ODU cut-off valve.
2.2.4.136
“U8” IDU pipeline error
Error display: ODU mainboard, IDU wired controller and IDU receive light board will
display
Error judgment condition and method:
During commissioning, check if IDU pipeline is blocked through detecting IDU pipeline. If the
parameter is abnormal, it will indicate t
Possible reason:
■Electronic expansion valve doesn’t operate normally;
■IDU pipeline is blocked;
Troubleshooting:
2.2.4.137
“U9” ODU pipeline error
Error display:
ODU mainboard, IDU wired controller and IDU receive light board will
display
Error judgment condition and method:
During commissioning, check if ODU pipeline is blocked through detecting system pressure. If the
parameter is abnormal, it will indicate this error.
Possible reason: