Samsung AM072/096/120/144FXVAFH, Service Manual

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Troubleshooting
4-6 Samsung Electronics
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Vacuum Operation
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Operation to facilitate vacuum to open the valve after the Outdoor Unit repair.
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Piping Inspection Operation
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Operation mode to check the status of the piping between the MCU and the indoor unit.
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MCU pipe connection check
- How to start : Press K2 4time (Heat Recovery only)
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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
ļ
C
o o L or P i P E
ļ
H E A T
2. Starting A
B C D
ļ
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
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When we have E
r r P press K2 to see more information
Error code(E190)
ĺ0&8DGGUHVV SRUW&$ĺ,'8DGGUHVVFKHVNHG ,'8DGGUHVVWHPSFKDQJHG
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E190 - No or wrong IDU's Evap in temp chaged
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E191 - No or wrong IDU's Evap out temp chaged
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Heat Pump Model : Outdoor temperature is more than 59
ሥ
/ Cooling commissioning start
Outdoor temperature is less than 59
ሥ
/ Heating commissioning start
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Discharge Mode Operation
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Outdoor power is turned off, the Inverter PCB and Fan 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.
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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' ' ' ' ‘
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DC Link Volt1 ( For example, 120[V] 0 1 2 0 display)
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DCLinkVolt2 ( For example, 120[V] 0 1 2 0 display)
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'K' 'A' ' ' ' ‘
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DC Link Volt1 …
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Discharge is complete, the power of the Inverter PCB and Fan PCB is being blocked, communication function is blocked, E206 will occur.
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If want operation again after complete discharge mode : Restart after K3 key to Reset or Power Reset.
How to Initiate K1 Tact Switch 7 times~11 times
Compressor OFF
Indoor Unit/Outdoor Fan OFF
4Way Valve OFF
Valves Open all valves maximum
Etc. If not turn off the vacuum mode, the start of normal operation is prohibited.