Troubleshooting

9-3-2 Checking Outdoor Controller

1.Making sure the wire connections.

2.Checking AC line

1)Checking FUSE

2)Checking resistance between 'L wire (SKY BLU)' and 'BD01 Neutral' normal value : 190 - 210Ω

If value is then check R001.

 

 

Live

 

 

Neutral

 

3)Checking resistance between 'N wire (BRN)' and 'BD01 Live side' normal value : 0 - 0.1Ω

3.Checking ON/OFF pattern of LED1(Red), LED2(Green), LED3(Yellow)

Apply the power then ALL LEDs are on for about 1 second. then changed to as follow.

LED1 (Red) : ALWAYS ON

LED2 (Green) : Blinking 4 times a second

(This means communication between 2 micoms IC01 and IC50 is normal)

LED3 (Yellow) : OFF

In case of another pattern inverter micom detects some hardware trouble or abnormal condition.

Yellow

Green

 

Red

Description

Note

 

 

 

 

 

 

Status indication

 

 

 

 

 

 

 

 

 

OFF

OFF

 

OFF

Power OFF / No power (SMPS error)

 

 

 

 

 

 

 

ON

ON

 

ON

Power on reset ( 1~2 seconds )

If always in this pattern IC01(inverter micom)

 

has some trouble.

 

 

 

 

 

 

 

 

 

 

 

OFF

Blink

 

ON

Normal operation

 

 

 

 

 

 

 

Hardware trouble

 

 

 

 

 

 

 

 

 

OFF

OFF

 

ON

Communication Error between

 

 

Main micom and inverter micom

 

 

 

 

 

 

 

 

 

 

 

 

Blink

Blink

 

ON

Current sensor error

 

 

 

 

 

 

 

ON

Blink

 

Blink

DC-LINK sensor error

 

 

 

 

 

 

 

ON

ON

 

Blink

AC-Line zero crossing error

After power off this error will display until

 

DC LINK capacitor discharged.(Max 20sec.)

 

 

 

 

 

 

 

 

 

 

 

 

ON

OFF

 

Blink

Option error (EEPROM error)

 

 

 

 

 

 

 

Abnormal condition

 

 

 

 

 

 

 

 

 

OFF

OFF

 

Blink

Comp. peak current (Over Current)

 

 

 

 

 

 

 

OFF

Blink

 

OFF

Comp. starting error

 

 

 

 

 

 

 

ON

OFF

 

ON

Comp. rotation error

 

 

 

 

 

 

 

OFF

ON

 

Blink

DC-Link voltage error

 

 

 

 

 

 

 

Blink

ON

 

OFF

Comp. V Limit Error

 

 

 

 

 

 

 

Samsung Electronics

9-14

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Image 84
Samsung MH026FNCA service manual Checking Outdoor Controller, LED1 Red Always on, LED3 Yellow OFF, Hardware trouble

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