EPM Chip — The drive uses a electronic programming module (EPM) chip to store the program parameters. This is an EEPROM memory chip and is accessible from the front of the VFD. It should not be removed with power applied to the VFD.
Loss of CCN Communications — Carrier Comfort Network® (CCN) communications with external control systems can be affected by high frequency electrical noise
generated by the Motormaster® V control. Ensure unit is well grounded to eliminate ground currents along communication lines.
If communications are lost only while Motormaster V con- trol is in operation, order a signal isolator
Table 6 — Fault Codes
The drive is programmed to automatically restart after a fault and will attempt to restart three times after a fault (the drive will not restart after CF, cF, GF, F1,
| CODE | DESCRIPTION | RESET | PROBABLE CAUSE | CORRECTIVE ACTION |
| METHOD | ||||
|
|
|
|
| |
| AF | High Temperature Fault | Automatic | Ambient temperature is too high; | Check cooling fan operation. |
|
|
|
| Cooling fan has failed (if equipped). |
|
| CF | Control Fault | Manual | A blank EPM, or an EPM with cor- | Perform a factory reset using Parameter |
|
|
|
| rupted data has been installed. | 48 – PROGRAM SELECTION. See Drive |
|
|
|
|
| Programming section. |
| cF | Incompatibility Fault | Manual | An EPM with an incompatible param- | Either remove the EPM or perform a fac- |
|
|
|
| eter version has been installed. | tory reset (Parameter 48) to change the |
|
|
|
|
| parameter version of the EPM to match |
|
|
|
|
| the parameter version of the drive. |
| F1 | EPM Fault | Manual | The EPM is missing or damaged. | Install EPM or replace with new EPM. |
| Internal Faults | Manual | The control board has sensed a | Consult factory. | |
| Fo |
|
| problem |
|
| GF | Data Fault | Manual | User data and Carrier defaults in the | Restore factory defaults by toggling P48 to |
|
|
|
| EPM are corrupted. | another mode. Then set P48 to desired |
|
|
|
|
| mode to restore all defaults for that mode. |
|
|
|
|
| See Drive Programming section. If that |
|
|
|
|
| does not work, replace EPM. |
| HF | High DC Bus Voltage Fault | Automatic | Line voltage is too high; Deceleration | Check line voltage — set P01 |
|
|
|
| rate is too fast; Overhauling load. | appropriately. |
| JF | Serial Fault | Automatic | The watchdog timer has timed out, | Check serial connection (computer). |
|
|
|
| indicating that the serial link has been | Check settings for P15. |
|
|
|
| lost. | Check settings in communication software |
|
|
|
|
| to match P15. |
| LF | Low DC Bus Voltage Fault | Automatic | Line voltage is too low. | Check line voltage — set P01 |
|
|
|
|
| appropriately. |
| OF | Output Transistor Fault | Automatic | Phase to phase or phase to ground | Reduce boost or increase acceleration |
|
|
|
| short circuit on the output; Failed out- | values. If unsuccessful, replace drive. |
|
|
|
| put transistor; Boost settings are too |
|
|
|
|
| high; Acceleration rate is too fast. |
|
| PF | Current Overload Fault | Automatic | VFD is undersized for the application; | Check line voltage – set P01 appropri- |
|
|
|
| Mechanical problem with the driven | ately. |
|
|
|
| equipment. | Check for dirty coils. |
|
|
|
|
| Check for motor bearing failure. |
| SF | Automatic | Check input power phasing. | ||
|
|
|
| applied to a |
|
Drive displays | Start Contact is Not Closed | Automatic | Start contact is missing or not | Check fan relay. | |
|
| functioning. |
| ||
though drive |
|
|
|
| |
should be |
|
|
|
| |
running |
|
|
|
| |
VFD flashes | Start Contact is Not Closed | Automatic | Start contact not closed. | Check FR for closed contact. | |
|
|
|
|
| |
and LCS |
|
|
|
| |
VFD flashes | Speed Signal Lost | Automatic | Speed signal lost. Drive will operate | Transducer signal lost. Check VDC signal | |
57 (or 47) |
|
| at 57 (or 47) Hz until reset or loss of | between TB5 and TB2. Should be in range | |
and LCS |
|
| start command. Resetting requires | of 0.5V to 4.5V. 5VDC output should be | |
|
|
|
| cycling start command (or power). | present between TB6 and TB2. |
| LEGEND |
|
|
|
|
EPM — Electronic Programming Module |
|
|
| ||
FR | — Fan Relay |
|
|
| |
LCS | — Loss of Control Signal |
|
|
| |
TB | — Terminal Block |
|
|
| |
VFD — Variable Frequency Drive
15
