6-1. If the trouble is detected by self-diagnosis
6. Self Diagnosis & Trouble Shooting
To do list
Start
Is Damper Heater
normal?(about135ohm)
Is MAIN PCB connector
(CN77) inserted correctly?
YES
Bad contact of connector/
insert correctly
NO
YES
NO
10) Mid Drawer Room Damper Heater has trouble (OPTION)
Is the input voltage of
IC01 MICOM #56 normal?
ERROR Code
YES
Measure the voltage of Resistance
between ① - ② after CN77 connector
open / 1350 ohm ± 7%
MICOM
#56
condition
Initial
power
On
Heater
off
Working
heater
3.5V ~
4.8V
3.5V ~
4.8V
0V
1) Wire connector
2) Replace Heater
1) Recheck the wire
2) Replace PCB MAIN
NO
Normal(recheck)
☞ Checking method of Flex Zone Room Damper
resistance CN77 -"1"(Black) ↔"2"(Brown)
** ∞Ω: Open
(wire disconnection,
heater disconnection)
trouble / 0Ω:
Short trouble
177
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