Samsung MH020FVEA, Service Manual

Page: 146 / 172

Samsung Electronics 9-14
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 - 210
Ω
If value is
∞
then check R001.
3) Checking resistance between 'N wire (BRN)' and 'BD01 Live side'
normal value : 0 - 0.1
Ω
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
Live
Neutral