MULTI VRF-Ⅱ INDOOR UNIT SERVICE MANUAL EUROPEAN/LATIN AMETICA (R410A)
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5.3.1 Master IDU Settings
The master IDU can be set through the wired controller or remote controller. The methods for setting the
master IDU through the remote controller are as follows:
Step 1: Set an IDU to air-supply status and set the temperature to 30°C.
Step 2: Continuously press “—” and “+” for three times within five seconds.
Step 3: Check whether the setting is successful. If it is, the LED panel of the IDU will display "UC" for five
seconds and "MASTER" on the wired controller will be on. Otherwise, repeat steps 1 and 2.
5.3.2 Parameter Query
Engineering application functions cover parameter query and parameter settings.
For parameter query, users can query user parameters and engineering parameters of the unit. The
parameter query method is as follows:
1) On the professional remote controller of YV1L1, press and hold "
" for five seconds to enter the
parameter query status. The viewing text is displayed. The query code "C00" blinks in the temperature
area.
2) Press " " to switch the query code and select a unit parameter to be queried (see Table 2.5 for
parameters that can be queried).
3) If the timer area displays query sub-items, it indicates that there are level 2 query menus. Press "
" to enter level 2 query menu selection. The content blinks in the timer area. Press " " to
switch query sub-items and select a level 2 menu to be queried.
4) Press "
" to confirm query and return to step 2.
After entering the engineering application function, the system automatically quits the engineering
commissioning status if no valid operations are performed within 20 seconds. To directly quit the
engineering commissioning status, press "
".
Table 2.5 Query Parameters
Project number query of the current IDU
Capacity query of the current IDU
Indoor unit quantity query in the CAN1 network
Project number query of the master IDU
Historical fault query ingress of the current
IDU
Preferential operation query
Temperature query for environment temperature sensor of the current IDU
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