GREE                                                                                          GMV5 INDOOR UNIT SERVICE MANUAL   
 
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5.1.5 Engineering Parameter Query 
Engineering parameters can be queried in power-on or power-off status. 
Press and hold the “FUNCTION” button for five seconds to enter the engineering parameter query 
interface. The temperature area displays “C00” and “View” is on. 
(1)  Within five seconds after “C00” is displayed, continuously press the “MODE” button for three 
times in an interval less than one second to enter engineering parameter query. 
(2)  Select a parameter code by pressing “ ” or “ ”. 
(3)  Press the “ENTER/CANCEL” button to return to the upper-level menu till quitting parameter 
query. 
In the engineering parameter query interface, users can also query user parameters listed in Table 
3.1.   
The engineering parameter query list is as follows: 
Table 2.3 Engineering Parameter Query List 
Parameter setting 
ingress (default) 
Display mode: 
Timer area: displays the project number of the current IDU. 
Note: If the current HBS network consists of multiple IDUs, only 
the IDU that has the minimum project number is displayed. 
Indoor unit 
capacity query 
Operation method: 
In “C02” status, press the “MODE” button to enter the 
preferential operation query interface. Press “ ” or “ ” to 
switch the project number of IDU. 
Display mode: 
Temperature area: displays the project number of the current 
IDU. 
Timer area: displays the current IDU capacity/IDU capacity after 
adjustment. 
Project number 
query of master 
IDU 
1-255: project 
number 
00: no master 
IDU 
Timer area: displays the project number of the master IDU/00. 
Historical fault 
query ingress of 
IDU 
Operation method: 
1. In “C05” status, press the “MODE” button to enter the 
historical fault query interface. Press “ ” or “ ” to switch the 
project number of IDU. Press the “MODE” button to enter fault 
code query of the current IDU. Press “ ” or “ ” to switch the 
fault SN. Press the “ENTER/CANCEL” button to return to the 
upper-level menu. 
Display mode: 
Temperature area: displays the fault SN and fault code. 
Timer area: displays the project number of IDU. 
Static pressure 
setting query of 
ODU 
00: 0 Pa 
20: 20 Pa 
50: 50 Pa 
82: 82 Pa 
Operation method: 
In “C10” status, press the “MODE” button to enter static 
pressure setting query of ODU. Press “ ” or “ ” to switch the 
ODU address. 
Display mode: 
Temperature area: displays the address of the current ODU. 
Timer area: displays the static pressure setting value. 
Outdoor unit 
network number 
query 
Timer area: displays the network number of the current ODU.