Samsung MH020FVEA Service Manual page 136

Troubleshooting
✳ Expected time of 4 indoor units installation.
✳
• [DIS02 ] shows the indoor unit under searching.
✳
• It could take more time depending on the indoor and outdoor temperature.
✳
• After completeing pipe check operation,it shows "
✳
• The left display DIS01 will show sequentially the following message:
✳ •
00 -Estabilished communication with indoor unit "A";
✳ •
01 -Estabilished communication with indoor unit "B";
✳ •
02 -Estabilished communication with indoor unit "C";
✳ •
03 -Estabilished communication with indoor unit "D";
✳ •
00 -Estabilished communication with indoor unit "A"...
✳
• Function of Step 3
Mode
Auto Addressing
Manual Addressing
- If the auto addressing does not work according to the indoor unit capacity, model or installation condition,apply the manual
addressing.
✳ When SW01 set "0"on Auto address mode,it means you install the maximum number of indoor unit.
1) Installation ID Unit Number=MAX Installation ID Unit Number of OD Unit.
➟ Don't need set SW01.
2) Installation ID Unit Number<MAX Installation ID Unit Number of OD Unit.
➟ Pls set SW01 as the number of which you install the indoor unit.
✳ On Manual address mode,you must set SW01 as the number of which you install the indoor unit.
- This mode is for finding the combination between indoor unit and each valve on the outdoor unit. Because refrigerant flow is
controlled with EEV in the outdoor, controller should know which EEV will control which indoor unit.
- Once "PIPE CHECK MODE" is done normally, each indoor unit will remember the given address number by the outdoor unit
and no need to do this checking. But in case of listed below, PIPE CHECK MODE should be done again.
2. - • Re-install the system (ie.house moving)
2. - • Remove indoor unit, Add new indoor unit, Change indoor PCB for repair.
2. - • Mode change from "manual addressing" to "auto addressing"
- On this mode the controller will ignore the manual address number set on the rotary switch on the indoor PCB.
- To confirm the indoor address number assigned by this mode, use "TEST MODE" and the address number will be displayed on
the LED display on the indoor unit.
9-4
" on the display PCB.
Function
Checking the connection & addressing
Checking the connection only
Samsung Electronics