Service Manual

U-Match Series DC Inverter Service Manual
47
7.2.5 Light board control:
Light board interface is reserved on the main board of duct type unit. You can purchase Gree light
board to realize control of the unit. When wired control is also connected, you can realize control of the unit
through light board and wired controller.
Light board information:
Name
Product code
Remark
Receiving board Z6L
30260000001
Only for duct type unit
There are two buttons on the light board to control ON/OFF of cooling and heating. There are also
other indicators and nixie tube display.
Cooling: set temperature 26°(79℉), low fan speed; heating: set temperature 20°(68℉), low fan speed
Function instructions: under OFF state, pressing Cool/Heat button can turn on cooling/heating mode.
Under unit ON state, pressing Cool/Heat button can turn off the unit. When the unit is in cooling/heating
mode, pressing any button can turn off the unit.
Figure 2-7-14
7.2.6 Malfunction output of relay:
There is malfunction outlet signal on the main board of indoor unit; when the unit occurs unrecovered
malfunction, this signal will be output.
(1) Interface instruction:
1) Printing: X5, ERROR
2) Electrical characteristic OF malfunction indicator or electric bell: 220V~AC, power≤10W
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.