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MULTI V 5 Outdoor Unit Service Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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ERROR CODES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
troubleshooting of the Multi V product.
WARNING
Error No. 75
Error No. Description Details Causes
75
Master: 751
Slave 1: 752
Slave 2: 753
Fan CT sensor
error.
Offset of MICOM; fan motor phase current is
not 2.5V Β± 0.3V.
1. Input voltage is not correct (not 15V).
2. Fan PCB assembly is defective.
3. Power wiring has disconnected or has
shorted.
4. Inverter PCB assembly is defective.
Is the input voltage
normal?
Check 15V input power wiring connections.
ξξΔΊξ5HZLUHξRUξUHFRQQHFWξLIξHUURUVξDUHξIRXQGξ
No
Yes
After power is reset, does the
error still occur?
No
Is the fan PCB correct?
Replace fan PCB.
No
Yes
Yes
Recheck power and installation.
Check if fan PCB IPM is correct.
ξΔΊξ5HSODFHξIDQξ3&%ξLIξHUURUVξDUHξIRXQGξ
Check DC 15V input power on Inverter compressor PCB.
Images here are representative of system components. Actual compo-
nent appearance depends on model and system type.
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