Troubleshooting
Samsung Electronics
4-5
■
Vacuum Operation
►
Operation to facilitate vacuum to open the valve after the Outdoor Unit repair.
■
Piping Inspection Operation
►
Operation mode to check the status of the piping between the MCU and the indoor unit.
►
MCU pipe connection check
- How to start : Press K2 4time (Heat Recovery only)
※
In heat pump model : select trial opration mode in cooling or heating mode automatically
- Operation sequence
OUD
IDU for checking
Other IDUs
Check point
Cooling
Normal operation
Fan on / EEV open
Fan on / EEV close
Evap in temp-lowest
Heating
Normal operation
Fan on / EEV close
Fan on / EEV open
Evap out temp-lowest
- Display
1. Starting
P i P E
↔
C o o L
or
P i P E
↔
H E A T
2. Starting
A B C D
↔
E F G H
A , B : Checking IDU address
C , D : IDU which evap in temp changed, "--" means none
E , F : no display
G , H : IDU which evap out temp changed, "--" means none
3. Finishing
H O L D
4. Result - Normal communication or
E r
r P
※
When we have
E r
r P
press K2 to see more information
Error code(E190)
→ MCU address & port (C00A) → IDU address chesked & IDU address temp changed(00--)
※
E190 - No or wrong IDU's Evap in temp chaged
※
E191 - No or wrong IDU's Evap out temp chaged
►
Heat Pump Model : Outdoor temperature is more than 15°C / Cooling Auto Trial Operation start
Outdoor temperature is less than 15°C / Heating Auto Trial Operation start
How to Initiate
K1 Tact Switch 7 times~10 times
K1 Tact Switch 11 times
Compressor
OFF
Indoor Unit/Outdoor Fan
OFF
4Way Valve
OFF
Valves
Open all valves of the outdoor unit
Open all valves of the system (Including indoor unit and mcu)
Etc.
If not turn off the vacuum mode, the start of normal operation is prohibited.
■
Discharge Mode Operation
►
Outdoor power is turned off, the Inverter PCB charging a high DC voltage, so dangerous to touch.
- To replace the PCB, first turn off the power and the begin if DC voltage is discharged.
- If not use the discharge mode, the discharge time of about 15 minutes takes.
- If an error occurs, the discharge mode may not properly run. (Wait until natural discharge.)
- In particular, E 464, E364, power devices may be damaged, therefore do not use the discharge mode.
(Natural discharge until Please wait for at least 15 minutes.)
►
Block the Inverter PCB 3-phase relay after connected the power, and through compressor, DC voltage is discharging.
- INV1 and INV2 DC voltage during discharge mode are displayed alternately.
- Discharge mode Display (Rotate the three page display, as shown below.)
'K' 'A' ' ' ' ‘
DC Link Volt1 ( For example, 120[V] 0 1 2 0 display)
DCLinkVolt2 ( For example, 120[V] 0 1 2 0 display)
'K' 'A' ' ' ' ‘
DC Link Volt1 …
►
Discharge is complete, the power of the Inverter PCB is being blocked, communication function is blocked, E206 will occur.
►
If want operation again after complete discharge mode : Restart after K3 key to Reset or Power Reset.