Co2 Sensor Error(Cn43) - Samsung ERV Operating Instructions Manual

9-4-2 CO Sensor Error(CN43)
2
Error Mode CO
Display
Check Method When CO
Cause PCB check, CO
Sensor SPEC. Preheating time in case of power supply authorization (2 minutes), Authorized power supply DC12V, 400~2,000PPM
No
No
Sensor check or
replacement
sensor checks DATA once in six seconds. It waits for 5 seconds and conducts data check for one second.
2
sensor and LED 1 light up for 1 second when the sensor check DATA.
2
Sensor checks DATA ranges 400PPM~2,000PPM.
2
9-4
sensor error (OPEN/SHORT)
2
input pulse maintains High status or Low status for longer than 2 minutes.
2
sensor check or replacement
2
E139 code appears when unit
operation starts or while it is in operation.
Is CO sensor connector (CN43)
2
of PCB dislocated from PCB?
Is sensor connector CN101
dislocated from the sensor?
Does LED1 of CO
flicker once in 6 seconds?
Is DC12V power measured
from sensor connector ①↔③?
Is square wave measured
from sensor connector ③↔②?
PCB check or replacement
No
No
sensor
2
Yes
Yes
Yes
Yes
Assembly the
connector
Check product
operation.
No
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