Troubleshooting
Samsung Electronics 137
■
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 operation 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 checked & IDU address temp changed(00--)
※ E190- No or wrong IDU's Evap in temp changed
※ E191- No or wrong IDU's Evap out temp changed
► 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
■
Discharge Mode Operation
► Outdoor power is turned off, the Inverter PBA charging a high DC voltage, so dangerous to touch.
- To replace the PBA, 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 PBA 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 PBA 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.
4-2 Service Operation (cont.)
4-2-1 Special Operation (cont.)
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