Samsung ACH1800E Technical Manual page 155

7
TROUBLE SHOOTING & ERROR MODE
Fault Diagnosis by Symptom
(Cont.)
G EC07 : When the trouble is found in the communication related part between outdoor unit pipe
thermistor.
- ED of 7-segment of outdoor unit PCB.
- Reservation lamp and filter lamp of wireless receiving board is flickering with 1Hz.
- Action item when "D" displays on the wired remote controller.
Check point :
- Indoor unit pipe thermistor available or not
- Indoor unit PCB defect
NO
Is indoor pipe thermistor installed at CN41? Connect correctly and check.
YES
NO
Is the voltage across the thermistor 4.9V and
Replace the outdoor PCB
higher or 0.5V and lower?
YES
Replace the thermistor
✽ "*" stands for the indoor unit address.
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