Gree GUHD09NK3FO Service Manual page 47

U-Match Series DC
Inverter Service Manual
pressing any button can turn off the unit.
7.2.6 Malfunction output of relay:
There is malfunction outlet signal on the mainboard of indoor unit; when the unit occurs unrecovered
malfunction, this signal will be output.
(1). Interface instruction:
1). Printing: X5, ERROR
3). Working principle: when the unit occurs unrecovered malfunction, the relay will suck and 220V AC
signal will be output.
(2). Function instructions:
When the user needs centralized control over several units, malfunction signals can be connected to
control room through this malfunction output interface. The user can indicate the unit malfunction through
malfunction indicator or electric bell, so the management people can go to check the malfunction unit directly.
If dry contact detection of unit malfunction is needed, please connect this interface into the monitoring
system. When the closed signal is detected when malfunction occurs, this signal can be seen in monitoring
system.
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Figure 2-7-14
Figure 2-7-15 Malfunction output