Troubleshooting
Samsung Electronics 69
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)
- 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
E , F : no display
3. Finishing
H O L D
4. Result- Normal communication or
E r r P
E r r P
► 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.
DC Link Volt1 ( For example, 120[V] 0
1 2 0 display) DCLinkVolt2 ( For example, 120[V] 0 1 2 0 display) 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.
Forced defrost operation
► Forced defrost operation : Is operation when Frost Formation occurs in the outdoor. (When carried out the service)
Method of Entry K2 Tact Switch 7 times
Start pattern Heating Trial Operation pattern
Defrost start Defrost start : It is after 10 minutes which Safety Start finishes.
Defrost off General defrost operation conditions are the same as.
Etc. Defrost shut down and stop the normal pattern of the outdoor unit stop.
4-2 Service Operation (cont.)
4-2-1 Special Operation (cont.)
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