25 Input Voltage high/low
Error
No.
Error Type Error Point Main Reasons
Input voltage is over limited
value of the product (173V
or less, 289V or more)
1. Input voltage abnormal (L1,L2)
2. Outdoor unit inverter PCB assembly dam-
age (input voltage sensing part)
■ Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal?
No
Yes
Yes
Recheck power and installation condition
Check
L1, L2 phase is 208/230V ±10%
→ Check connection condition and wiring if power is
abnormal
Is inverter PCB assembly normal?
No
Replace inverter PCB assembly
Measuring input voltage Inverter PCB assembly power wiring
Troubleshooting Guide
- 78 -
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