Below you will find information on the most common fault codes we see on the Airvolution and AirLegacy lines utilizing Yaskawa V1000 VFDs. Click on any of the links in the VFD Readout column to take you to the full article for that fault code.
| Alarm Code |
Definition
|
Description
|
Symptoms
|
Possible Causes
|
Solutions
|
|
| VFD Readout |
Touchscreen | |||||
|
COMM ERROR
|
Communication Transmission Error
|
Communication Has Not Been Established With The Drive
|
The Fan Will Not Start.
|
CAT5 Cable Is Not To Spec (CAT5e Shielded Stranded Minimum) |
Verify Cable, Replace Out Of Spec Cable | |
| CAT5e Cable Is Damaged | Replace Damaged CAT5e | |||||
| CAT5e Cable Is Too Long (200' Maximum on Touchpad) |
Shorten CAT5e Run To Appropriate Length | |||||
| (Network Only) Cat5e Is Not Daisy Chained | Rewire Network To Have One Beginning (Controller) And One End (Last Control Panel) | |||||
| CAT5e Cable Ran Next To High Voltage | Run CAT5e Away From High Voltage | |||||
| The Control Source Was Unplugged | Plug Control Source In | |||||
| The Drive Is Not Properly Grounded | Properly Ground The Drive | |||||
| CAT5e Is Coiled | Ensure There Are No Coils In The CAT5e Run | |||||
|
20
|
Modbus Comms Fault
|
The VFD Lost Communication With The Control Source (Touchpad, Controller 30, Etc.)
|
The Fan Shuts Down And/Or Will Not Start.
|
CAT5 Cable Is Not To Spec (CAT5e Shielded Stranded Minimum) |
Verify Cable, Replace Out Of Spec Cable |
|
| CAT5e Cable Is Damaged | Replace Damaged CAT5e | |||||
| CAT5e Cable Is Too Long (200' Maximum On Touchpad) |
Shorten CAT5e Run To Appropriate Length | |||||
| (Network Only) Cat5e Is Not Daisy Chained | Rewire Network To Have One Beginning (Controller) And One End (Last Control Panel) | |||||
| CAT5e Cable Ran Next To High Voltage | Run CAT5e Away From High Voltage | |||||
| The Control Source Was Unplugged | Plug Control Source In | |||||
| The Drive Is Not Properly Grounded | Properly Ground The Drive | |||||
| CAT5e Is Coiled | Ensure There Are No Coils In The CAT5e Run | |||||
|
None
|
Run Command Restricted
|
The Drive Detects A Run Command, But Something Is Preventing The Drive From Running
|
The Fan Shuts Down And/Or Will Not Start.
|
Orange/Orange White In CAT5e Not Shorted Together |
Short Orange/Orange White Wires In CAT5e Together |
|
| Fire Alarm Has Been Activated | Rectify Fire Alarm Issues | |||||
| CAT5 Cable Is Not To Spec (CAT5e Shielded Stranded Minimum) |
Verify Cable, Replace Out Of Spec Cable | |||||
| CAT5e Cable Is Damaged | Replace Damaged CAT5e | |||||
| Wires Are Not Present On S5 And SC Terminals |
Land Orange And Orange White Wires On S5 And SC Terminals |
|||||
| Orange/Orange White Tied Into Network Of Non-Yaskawa Drives |
Separate Orange/Orange White From Non-Yaskawa Drives | |||||
| Speed Is 0 | Give A Speed Command | |||||
|
60
|
Hardware Baseblock Fault
|
The VFD Detected The Connection Between The H1 And HC Terminals Was Broken
|
The Fan Shuts Down And/Or Will Not Start.
|
H1/HC Factory Jumper Was Removed | Place Jumper Between H1 And HC | |
| VFD Is Damaged | Replace VFD | |||||
|
28
|
1 Motor Output Phase Loss
|
The VFD Detected At Least One Wire Missing From The Drive Output
|
The Fan Shuts Down And/Or Will Not Start.
|
A Wire Is Loose/Missing On Drive Output | Ensure That All 3 Motor Leads Are Present On The Drive Output |
|
| A Wire Is Loose In The Motor | Ensure That All 3 Motor Leads On The Drive Output Are Secure |
|||||
| Damaged/Incorrect Motor Cable | Replace Motor Cable | |||||
| Motor Is Not Wired Correctly | Correct Motor Wiring | |||||
|
7
|
Overcurrent
|
The Output Current(A) Is Too High
|
The Fan Shuts Down And/Or Will Not Start.
|
Motor Is Miswired (Likely High/Low Voltage Mixup) |
Correct Motor Wiring | |
| Incorrect Blades Installed On The Fan | Install The Correct Blades On The Fan | |||||
| Motor Cable Is Not To Spec | Replace With Proper Motor Cable | |||||
| Motor Cable Is Too Long | Shorten Motor Cable To Acceptable Length | |||||
| Motor Cable Is Damaged | Replace Motor Cable | |||||
| Motor Is Damaged/Shorted | Replace Motor | |||||
| VFD Parameters Not Set Correctly | Correct VFD Parameters (Contact Tech Support) | |||||
|
9, 10, 29
|
Drive Overheating
|
The VFD Has Exceeded The Rated Temperature
|
The Fan Shuts Down And/Or Will Not Start.
|
High Ambient Temperature | Only Operate VFD Below Rated Temperature (40C) |
|
| VFD Control Panel Mounted Next To Heat Source |
Relocate VFD Control Panel | |||||
| Motor Is Overloading | Refer To OL1 (11) Section | |||||
|
11, 12
|
Current Limit
|
The Drive Has Reached Or Exceeded The Output Current Limit
|
The Fan Will Stop Accelerating.
|
Motor Is Miswired (Likely High/Low Voltage Mixup) |
Correct Motor Wiring | |
| Incorrect Blades Installed On The Fan | Install The Correct Blades On The Fan | |||||
| Motor Cable Is Not To Spec | Replace With Proper Motor Cable | |||||
| Motor Cable Is Too Long | Shorten Motor Cable To Acceptable Length | |||||
|
The Fan Will Shut Down.
|
Motor Cable Is Damaged | Replace Motor Cable | ||||
| Motor Is Damaged/Shorted | Replace Motor | |||||
| VFD Parameters Not Set Correctly | Correct VFD Parameters (Contact Tech Support) | |||||
|
Unknown
|
Frequency Reference Or Run Command Is Misassigned
|
The VFD Detected A Conflict In The Command Parameters
|
The Fan Shuts Down And/Or Will Not Start.
|
Parameters B1-01 And B1-02 Are Not Correct | Correct VFD Parameters (Contact Tech Support) | |
| Remote Wiring Is Incorrect | Correct Remote Wiring | |||||
| VFD Is Damaged | Replace VFD | |||||
|
Unknown
|
V/F Data Setting Error
|
The VFD Detected A Conflict In The V/F Parameters
|
The Fan Shuts Down And/Or Will Not Start.
|
Parameter Group E1 Is Not Correct | Correct VFD Parameters (Contact Tech Support) | |
| Other Parameters Are Not Correct | Correct VFD Parameters (Contact Tech Support) | |||||
| VFD Is Damaged | Replace VFD | |||||
| OV | 8 | Mains Overvoltage | The VFD Input Voltage Exceeded The Drive Rating |
The Fan Shuts Down And/Or Will Not Start. | Input Voltage Is Too High | Ensure Input Voltage Is Below VFD Max Rating |
|
27
|
Input Phase Loss
|
The VFD Detected At Least One Wire Missing From The Drive Input
|
The Fan Shuts Down And/Or Will Not Start.
|
Breaker Is Off | Turn The Breaker On | |
| Loose/Missing Wire On Drive Input | Correct Drive Input Wiring Issues | |||||
| Blown Fuse In Control Panel | Replace Fuse | |||||
| Incoming Voltage Is Too Low (Ex. 208V On a 480V Drive) |
Provide Appropriate Voltage To Drive | |||||
| Bad Drive | Replace Drive | |||||
|
15
|
Dynamic Braking Transistor
|
The VFD Detected An Internal Error
|
The Fan Shuts Down And/Or Will Not Start.
|
Momentary Error | Cycle Power | |
| VFD Is Damaged | Replace VFD | |||||
|
5
|
Motor Short Circuit
|
The VFD Detected A Short On The Output Side
|
The Fan Shuts Down And/Or Will Not Start. The Fan Runs Erratically.
|
Incorrect Motor Wiring | Correct Motor Wiring | |
| Damaged/Incorrect Motor Cable | Replace Motor Cable | |||||
| Incorrect Wiring On VFD Output | Correct VFD Wiring | |||||
| Motor/Drive System Not Properly Grounded |
Correct Grounding Issues | |||||
| VFD Is Damaged | Replace VFD | |||||
|
2
|
Supply Undervoltage
|
The VFD Input Voltage Is Too Low
|
The Fan Shuts Down And/Or Will Not Start.
|
Momentary Input Power Loss | Reset Fault/Cycle Power To Drive |
|
| A Wire Is Loose/Missing On Drive Input | Ensure All Incoming Power Legs Are Secure On The Drive |
|||||
| Input Voltage Is Too Low | Ensure Input Voltage Is Sufficient For VFD Model |
|||||
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