Test Operation; Initial Power Up - Haier MRV5-H Service Manual

7.2 Test Operation

7.2.1 Initial Power Up

No.
Whether there is power on interface board of the outdoor unit, whether the 7-segment display is
1
on and whether the displayed data on dip switch panel and the 7-segment display are variable.
For MRV outdoor unit; indoor unit number displayed on the 7-segment display is consistent with
2 the actual number when dip switch panels SW1, SW2 and SW3 are turned to "0 3 2", and dip
switch code BM1-2 is turned from OFF to ON.
For MRV outdoor unit system, outdoor unit number displayed on the 7-segment display is
3 consistent with the actual number when dip switch panels SW1, SW2 and SW3 are turned to "0
2 2", and dip switch code BM1-1 is turned from OFF to ON.
For MRV outdoor unit system, the HP of outdoor unit sets displayed on the 7-segment display is
consistent with the actual unit type when dip switch panels SW1, SW2 and SW3 are turned to "0
1 2"
4 MVHP072ME4CA shows "1-69"
MVHP096ME4CA shows "1-92"
MVHP120ME4CA shows "1-115"
MVHP144ME4CA shows "1-138"
Check whether the parameters, such as parameters of outdoor unit sensors, number of indoors
5 connected and the opening of electronic expansion valves, etc., are correct through dip switch
on the outdoor unit interface board or by using testing equipment and computer software.
Check whether the parameters, such as parameters of indoor unit sensors, the opening of
6 electronic expansion valves, etc., are correct through dip switch on the outdoor unit interface
board or by using testing equipment and computer software.
Note:
If the indoor unit cannot be searched or the number of the searched units isn't consistent with the actual number of
indoor units in the system within four and a half minutes, it will be reported as communication fault 26-X.
Contents to be confirmed
78
Result