177
Error Codes
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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. 77
Error No. Description Details Causes
77
Master: 771
Slave 1: 772
Slave 2: 773
Outdoor unit fan
overcurrent error.
Outdoor unit fan current is >10A (for 208-230V
units) or 5A (for 460V units).
1. Overload operation.
2. Fan motor is defective.
3. Fan PCB assembly is defective.
4. Fan motor connector is not inserted
correctly.
5. Condenser has iced up or is blocked.
Is the installation correct?
Check if the outdoor unit fan motor assembly is correct or if it is
locking up.
ĺ5HDVVHPEOHRUUHSODFHLIHUURUVDUHIRXQG
No
Yes
Are the motor wire con-
nections correct?
No
The resistance
between each phase
and the insulation resistance of
the motor output terminal
correct?
No
Yes
Recheck power and installation.
1. Check if the color of the motor output terminal (U,V,W) connec-
tions match the PCB connections.
2. Check if the wiring has disconnected or has been damaged.
ĺ5HDVVHPEOHRUUHSODFHLIHUURUVDUHIRXQG
Is the fan PCB assembly
correct?
Yes
Yes
No
Check if the fan PCB assembly IPM is correct.
ĺ5HSODFHIDQ3&%DVVHPEO\LIHUURUVDUHIRXQG
1. Check resistance between each motor output terminal.
2. Check insulation resistance between the outdoor unit fan motor termi-
nal (U,V,W) and piping (over 100M).
ĺ5HDVVHPEOHRUUHSODFHIDQPRWRULIHUURUVDUHIRXQG
Small Frame Large Frame
Power Supply
208V/230V,
60Hz,
3-phase
460V,
60Hz,
3-phase
208V/230V,
60Hz,
3-phase
460V,
60Hz,
3-phase
Rating Output 1,500 W 1,200 W 900 W 900 W
Motor Resistance
at 167°F
ȍ ȍ ȍ ȍ
Measure fan motor phase
resistance.
Images here are representative of system components. Actual compo-
nent appearance depends on model and system type.
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