Multi Zone Service Manual - General

5. Trouble Shooting
- 73 -
Only for training and service purposes
Check Point
1. Check the Input Voltage (L–N ‘ 220V±10%)
2. Check Input Voltage Sensor output voltage (2.5Vdc±10%)
Is Inverter PCB Normal?
No
Replace inverter PCB assembly
Is input voltage normal ?
No
Check L~N Voltage is 220V±15%
Yes
< Input Power Source Check Point >
Recheck power and
installation condition
Yes
n Error Diagnosis and Countermeasure Flow Chart
40
C/T
Sensor Error
• Initial current error
• Malfunction of current detection circuit.
(Open / Short)
• Check CT Sensor output voltage :
2.5Vdc ±5%
Display
code
Title Cause of error Check point & Normal condition