LED
Item Trouble contents Diagnostic method
F R
Panel ↔ Main
Communication
Error
Display pc - Er in the panel
with alarm : MICOM MAIN ↔
PANEL communication error.
Actually, If there is not a problem, it is
desirable to replace Main and Panel PCB
With the oscilloscope after a cable
problem confirming.
Ice Duct Heater
Error
Display error when open error
is detected by ice duct heater :
separation of Ice Duct Heater
housing part, contact error,
disconnection, short circuit.
After separating MAIN PCB CN70 wire
from PCB, resistance value between
CN70 Brown ↔ CN70 Gray shall be
63(230) ohm
± 7%.
(Resistance value is varied by input
power) 0ohm : heater short, ∞ ohm :
wire/bimetal open(Must power off)
Ice Room Bucket
Heater Error
Display error when open error
is detected by ice room
bucket heater : separation
of Ice Room Bucket Heater
housing part, contact error,
disconnection, short circuit.
After separating MAIN PCB CN79 wire
from PCB, resistance value between
Yellow ↔ Pink wire shall be 135 ohm
±
7%.
0 ohm : heater short, ∞ Ohm : wire /
bimetal Open.
Comp starting
Failure
When the Compressor fails
starting
1. Short between Comp connector (CN04)
2. Short among IPM pins
3. Drop the IPM operating Voltage under
DC13.5 [Check the REG1]
4. Other cases, Check the COMP, cycle,
etc
IPM Fault
When there is a IPM Fault
error
* Self-diagnosis CHECK LIST
To do list
5. Check the installation status
5-1. Function for failure diagnosis
136
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