➁Disconnect heating gas valve (GV1, CN08) connector, and measure resistance at connector.
Normal
WHT – WHT 1 – 2.5 kΩ
* Use a circuit tester (set to Ω range).
In case of abnormality ➞ Replace heating electromagnetic valve.
3) Check electromagnetic valve (GV2) of the combination gas valve.
➀Measure DC voltage at electromagnetic valve connector (CN08) (under heating operation, during combustion).
Normal
ORG – ORG DC 90 – 120 V
*Use a circuit tester (set to DC range).
In case of abnormality ➞ Replace outdoor unit PCB.
➁Disconnect heating electromagnetic valve connector (CN08), and measure resistance at connector.
Normal
ORG – ORG 1 – 2.5 kΩ
* Use a circuit tester (set to Ω range).
In case of abnormality ➞ Replace heating electromagnetic valve.
4) Check proportional control valve (PV).
➀Measure DC voltage at proportional valve connector (CN11) (under heating operation, during combustion).
Normal
BLU – BLU DC 5 – 30 V
*Use a circuit tester (set to DC range).
In case of abnormality ➞ Replace outdoor unit PCB.
5) Check flame rod.
➀Check if flame rod connector (CN17, 1P) is connected properly.
➁Measure AC voltage between flame rod connector and ground.
Normal
AC 104 – 126 V
*Use a circuit tester (set to AC range).
In case of abnormality ➞ Replace flame rod.
➂Disconnect flame rod connector (CN17) and measure direct current at connector.
Normal
DC 2µA or more
*Use a circuit tester (set to DC range).
In case of abnormality ➞ Replace flame rod.
12-6-6. Erroneous Flame-Out Condition
Failure Display on Outdoor Unit PCB: ● ● ● ●
➀Check in same manner as “Failure Display● ● ● ●.”
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