Miscellaneous Errors /d Series

!Perform any service if;
• Person going to work on the compressor is certified,
• Compressor completely shut down and electrically isolated,
• All compressed air is discharged inside the compressor,
• Compressor is completely isolated from the compressed air system.

!In order to serve Us Air Compressor customers faster and better tin order to diagnose product related emails(subject or body part) or text message (body part of the picture sending not as a separate message) , compressor serial number must be written in the communication media.

Type 3 Inverter Miscellaneous Errors

Error Shown	Reason	US Air Connect Error Code	Solution
OC1	Accelerate over current	E62	Check Input voltages, if below or above limits correct input voltages, Fix if there are any loose connection, terminals on the power input cables or feed cables the motor, Increase Acceleration time
OC2	Slow down over current	E63	Check Input voltages, if below or above limits correct input voltages, Fix if there are any loose connection, terminals on the power input cables or feed cables the motor, Increase deceleration time
OC3	Constant speed over current	E64	Check Input voltages, if below or above limits correct input voltages, Fix if there are any loose connection, terminals on the power input cables or feed cables the motor,
OU1	Accelerate over the voltage	E65	Check Input voltages, if below or above limits correct input voltages, Fix if there are any loose connection, terminals on the power input cables or feed cables the motor, By-Pass Line reactor, test the compressor again. If Error corrected change or modify line reactor.
OU2	Slow down over voltage	E66	Check Input voltages, if below or above limits correct input voltages, Fix if there are any loose connection, terminals on the power input cables or feed cables the motor, By-Pass Line reactor, test the compressor again. If Error corrected change or modify line reactor.
OU3	Constant speed over voltage	E67	Check Input voltages, if below or above limits correct input voltages, Fix if there are any loose connection, terminals on the power input cables or feed cables the motor, By-Pass Line reactor, test the compressor again. If Error corrected change or modify line reactor.
LU	Under-voltage fault	E68	Check Input voltages, if below or above limits correct input voltages.
LI	The output phase	E71	One of the input phases are missing. Check beaker, fuses, feed cable and connections. Phase may get lost momentarily. Inverter will be capturing the phase loss very fast and stop.
CE	Abnormal communication	E74	Check internal cabling for single inverter integrated drives, Check rs485 cabling in between main inverter and fan inverter. Make sure connections are all fixed and there are no other wires connected to the communication ports.
RAY	Abnormal contactor	E75	Consult Us Air Compressor technical service
IE	Current detection fault	E76	Check inverter control board connection wires. If loose fix the wires or take of and clean the terminal and reinstall gently to make sure connector is properly installed
OUOC	Inverter hardware failure	E79	Consult Us Air Compressor technical service
GND	Motor for short circuit fault	E80	Check Motor feed cables and connectors are fixed and not short circuiting to ground, fix the wire or terminals loose. Check if motor if burnt. Replace if motor is burnt.
PIDE / NNA	PID feedback lost during running	E84	Check pressure sensor and loose or cut wiring to the pressure sensor.

Type 3 inverter fan inverter errors 

Error Shown	Reason	Solution
FoC1,FoC2,FoC3	Output short circuit	Check wiring to the fan. If loose or damaged or cut replace/repair/fix the cable, Check the Fan(s). If damaged change the fan(s)
FUC1,FUC2,FUC3	Output short circuit	Check wiring to the fan. If loose or damaged or cut replace/repair/fix the cable, Check the Fan(s). If damaged change the fan(s)
FoU1，FoU2，FoU3	Over voltage	Check Input voltages, if below or above limits correct input voltages.
FLU	Under voltage	Check Input voltages, if below or above limits correct input voltages
Flo	Output phase loss	Check wiring to the fan. If loose or damaged or cut replace/repair/fix the cable, Check the Fan(s). If damaged change the fan(s)
FJoL	Inverter overload	Check wiring to the fan. If loose or damaged or cut replace/repair/fix the cable, Check the Fan(s). If damaged change the fan(s)
FoH	Inverter overheat	Check procedure for OH
F-Co	Communication error at fan inverter	Check ribbon cable connection on the controller board. Plug them off and plug again. Make sure the terminals are properly connected.

!Perform any service if;
• Person going to work on the compressor is certified,
• Compressor completely shut down and electrically isolated,
• All compressed air is discharged inside the compressor,
• Compressor is completely isolated from the compressed air system.