1. 2008 AQV, EH, DH and FJM Inverter Troubleshooting
Samsung Mini Splits
2008 AQV, EH, DH and FJM Inverter
Troubleshooting
Sept

2. Troubleshooting
Units use either the operating lights on the Indoor (High Wall) or fault codes on the wired remote controller OR
3 LED’s on the Outdoor unit PCB to show what fault has occurred, error codes can be seen on both main PCB and also test operation PCB
LED’s

3. High Wall Indoor Error Codes

4. Indoor Error Codes in detail
Room Temp Sensor error – unit cannot read the resistance of the sensor, check with Multi meter
60 DegF = 14,200Ω
70 DegF = 11,700Ω
80 DegF = 9,300Ω
Coil (Heat Exchanger) Temp Sensor error – unit cannot read the resistance of the sensor, check with Multi meter
30 DegF = 28,500Ω
40 DegF = 23,000Ω
50 DegF = 18,000Ω
The higher the resistance the colder the temperature that the sensor thinks it is seeing

5. Indoor Error Codes in detail
Indoor Fan Motor error – the RPM sensor reads a speed below 380 RPM
Check connections from Indoor PCB to fan motor
Check voltage from CN72 on PCB to fan motor – approx 180V
EPROM/Option Code error – PCB memory is corrupted or wiped out, possibly due to voltage spike (thunderstorms etc) or low voltage condition
Reprogram unit using Remote controller
Outdoor unit Error – See specific error code on Outdoor unit

6. Outdoor Unit Error CodesY G R
Explanation ○ ⊙
IPM Over Current (O.C) ●
Normal Operation
Comp Starting error
Comp Lock error
DC-Link voltage under/over error
Outdoor temp sensor error (Dual/Single)
Discharge over temperature (Dual/Single)
Discharge temp sensor error (Dual/Single)
Current sensor error
Comp V-limit error
Coil temp sensor error (Dual/Single)
1min. Time out Comm. Indoor <-> Outdoor)
Fan error
OTP error
Comp rotation error
Operation condition secession (Dual only – not on AQB/v/EH units
DC-Link voltage sensor error
I_Trip error / PFC Over current
Refrigerant Leak error (Dual/Single)
AC Line Zero Cross Signal out
Capacity mis-match ○
OFF ● ON ⊙
BLINK

7. Outdoor Error Codes in detail
IPM Over Current – Also E464
Compressor is drawing excessive current, unit will restart 9 times before error code is seen
What are we protecting – Compressor Motor & IPM Semi Conductor
Causes –

8. Outdoor Error Codes in detail
IPM Over Current Error / OC error (E464)
Causes
Indoor air flow blocked in heating mode by blade closing, covering air inlet with curtain, etc.
Compressor motor or wiring short circuit,
Compressor wires disconnecting from the compressor connector during rotation
Compressor lock, Compressor magnet demagnetizing
Compressor rotation error,
High compressor load in low speed operation
PCB short circuit, IPM breakdown,
OC signal
Motor Current
IPM OFF &
Motor Stop
OC Level
IPM ( IGBT module ) U V W
Compressor Motor N S + -
DCV Ed

9. Outdoor Error Codes in detail
Comp Starting Error (E461)–
Compressor does not start, it has 15 seconds to start and will try 5 times to start

10. Outdoor Error Codes in detail
Comp Starting Error (E461)
Cause :
Compressor wire trouble (disconnect etc.)
Cycle pressure unbalance at the compressor
( Pressure difference between discharge and suction )
Compressor trouble ( locking)
PCB trouble (IPM open mode failure etc.)

11. Outdoor Error Codes in detail
Compressor Lock Error
Compressor is not running despite being energized. The compressor has a rotational sensor that will tell the unit if it is running or not
Unit will try to restart 3 times before displayed error code (each restart will have a 3 minute time delay)
Causes – failed Compressor, liquid slugging

12. Outdoor Error Codes in detail
DC Link Voltage Under/Over – Voltage across C101, 102 & 103 on the Outdoor PCB is out of range
Causes – Mains voltage spikes or brown outs, Compressor slugging liquid, bad Outdoor PCB
Outdoor Temp Sensor Error – unit cannot read the resistance of the sensor, check with Multi meter – same curve as Indoor Temp sensors
40 DegF = 23,000Ω
60 DegF = 16,200Ω
80 DegF = 9,300Ω

13. Outdoor Error Codes in detail
Discharge Over Temp Error – Discharge temperature is out of range, if it is too high this can damage the oil and the compressor
Causes – Undercharge, Refrigerant leak, failed EEV
To check EEV use a multi meter to check the resistance of the EEV solenoid coil – it has 6 separate taps which allow it to have 480 steps of movement
COIL resistance
 46±2Ω(68F)
BROWN - ORANGE
BROWN - YELLOW
GRAY - BLACK
GRAY-RED

14. Outdoor Error Codes in detail
Discharge Temp Sensor Error – unit cannot read the resistance of the sensor, check with Multi meter
100 DegF = 124,000Ω
120 DegF = 85,000Ω
140 DegF = 59,000Ω
Current Sensor Error – Current draw of the unit is excessive, especially on initial start up
Causes – Mains Power problem, Outdoor Coil blocked or bad Outdoor fan motor, low refrigerant charge, locked Compressor

15. Outdoor Error Codes in detail
Comp V Limit Error –
High capacity load on the system but compressor is running below 780RPM although controller is trying to speed up the compressor
Unit will restart 9 times to try and clear the fault before showing the error code, each restart will have a 3 minute time delay before the next start
Causes – High discharge pressure, possible overcharge

16. Outdoor Error Codes in detail
Coil Temp Sensor Error – unit cannot read the resistance of the sensor, check with Multi meter – Same curve as Indoor coil temp sensor
60 DegF = 16,200Ω
80 DegF = 9,300Ω
100 DegF = 6,300Ω
Outdoor Fan Error – Outdoor fan motor is not operating
Causes – Bad Outdoor fan motor, Obstruction, check for 220V AC Output to fan motor from Outdoor PCB (Blue & Red)

17. Outdoor Error Codes in detail
OTP Error –
Outdoor unit PCB has an incorrect or has lost it’s program
Causes – Bad Outdoor PCB, Mains Voltage issues

18. Outdoor Error Codes in detail
Comp Rotation Error (E467)
Compressor is not running, will restart 3 times to clear the fault, each start will have a 3 minute time delay before displaying the error code
Failure of BLDC motor rotation control.
Over load condition and unable to make enough torque to rotate.
Or the sensorless position detection system cannot detect rotor position during rotation
Restart will be in 3 minutes but 3 times stop makes Error.

19. Outdoor Error Codes in detail
Comp Rotation Error (E467)
Cause :
Cycle Overload (possible overcharge)
Mains Power voltage changes quickly
Cycle load changed quickly
Compressor is bringing liquid back
Compressor locked or motor magnet demagnetizing
PCB trouble

20. Outdoor Error Codes in detail
Comp Rotation Error (E467)
Compressor Motor Torque calculated from Pressure of discharge and suction Pd Ps

21. Outdoor Error Codes in detail
Refrigerant Leak Error – Unit will recognize that performance and temperatures are not consistent with load or compressor speed
Causes – Refrigerant undercharge for specific line set length or a leak has lost refrigerant

22. Outdoor Error Codes in detail
DC-Link voltage under/over Error (E466)
Meaning :
DC-Link voltage drop or up with some reason during operation.
System stops the compressor immediately.
Restart will be in 3 minutes but no retry limit.
Error shown on outdoor unit only.
Protection purpose :
Rotation trouble
Cause :
Power line voltage changes quickly.
Power line disconnect during compressor running.
Lightning surge noise.
Compressor liquid back. Compressor trouble.
PCB trouble.
IPM ( IGBT module ) U V W
Compressor Motor N S + -
DCV Ed

23. Outdoor Error Codes in detail
Communication Error (E101, E202)
Meaning :
Unable to communicate between Indoor unit and Outdoor unit
for 1 minute.
Cause :
Communication line trouble.
(Off the wire from terminal, snapping of the wire )
Miss wiring between Indoor unit and Outdoor unit
Blowing the fuse in the controller.
PCB trouble.
WRONG OPTION CODE setting

24. Outdoor Error Codes in detail
I Trip Error – Unit current draw is too high, compressor will try to slow down to reduce current draw, unit will restart 3 times before displaying error code
Causes – Indoor/Outdoor temperature changes, Low mains Voltage, excessive capacity load on the unit

25. Outdoor Error Codes in detail
AC Line Cross Signal Error – AC Line is checking incoming power frequency 50 or 60 Hz
Causes – Bad Outdoor PCB, unless unit has been resold to a Caribbean beach hut!
Capacity Mis-Match Error – Indoor and Outdoor unit do not communicate properly, possible mis-match of e.g. 18k Indoor Unit with a 24k Outdoor unit
Causes – Incorrect Option code flashed to the Indoor unit, reprogram the Option code at the Indoor unit, bad Indoor/Outdoor PCB

26. FJM Error Codes in detail
E161 – Mixed Use error code : One Indoor unit is programmed for Heating, when other units on the system are operating in Cooling. System will not reset itself until unit with conflicting mode has been turned off
E190 – Failure of Pipe Check : Check wiring/piping and addressing of the Indoor units
E199 – Tracking is complete, ready for Pipe Check
E201 – Number of Indoor units set on the rotary dial (Outdoor unit) does not match number of Indoor units tracked on the system
After correcting these errors button K3 will reset the system

27. Warranty Since 2006 units have warranty coverage of 5 Years Compressor
3 Years on all other Parts
120 Days Limited Labor Warranty
Parts are shipped out, usually on the same day using an ground service. This is dependant on a completed warranty claim form being received by Quietside
The failed part need not be returned to Quietside unless specifically asked for

28. Literature Available Sales brochure (Color) Product Submittals
Basic Application and Technical Guide & Samsung 108,
teaching sizing, usage and basic installation techniques
Warranty Booklet – Everything about Warranty
Installation and Operation Manuals
Service Manuals – very important as these units are self
diagnostic

29. Support Available Sales Support Local Representation
Quietside sales staff
Regionalized
Customer Support
Technical Support
East Coast
Denis, Mike, Chris
West Coast
John, Stu, Kevin
Website :

30. Thanks for attending Any Questions??????????