Table 6 — Powerflex 755 Fault Code Descriptions and Corrective Actions
VFD |
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FAULT | ICVC |
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CODE |
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FAULT | FAULT TYPE | DESCRIPTION | CORRECTIVE ACTION | ||
ON VFD | |||||
STATE |
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HIST |
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SCREEN |
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NONE | 206 |
| Processor memory fault | Consult VFD manual to resolve generic fault. | |
0 |
| No Entry |
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| Check Compressor Discharge High Pressure | |
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| switch wiring and accuracy. | |
2 | 207 | Auxiliary Input | Input is open. | Check for high condenser water temperatures, | |
low water flow, fouled tubes. | |||||
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| Check for division plate/gasket bypass. Check for | |
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| noncondensables in refrigerant. | |
3 | 210 | Power Loss | Line voltage dropout | Temporary loss of voltage. Disable Single Cycle | |
Dropout in VFD_CONF sceen. | |||||
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4 |
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| Verify | |
215 | Undervoltage | Low DC bus voltage | voltage. VFD Circuit Board malfunction. | ||
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| Call Carrier Service. | |
5 |
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| Verify phase to phase and phase to ground line | |
166 | Overvoltage | High DC bus voltage | voltage. Monitor AC line for high transient voltage | ||
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| conditions. | |
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| Any phase current > 106% RLA. Can result from | |
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| significant load side current imbalance when | |
7 |
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| running at full load. | |
217 | Motor Overload | An internal electronic overload trip has occurred. | Check entering condenser water temperature | ||
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| and water flow rate. | |
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| Check Motor Rated Load Amps in VFD_CONF | |
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| screen. | |
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| Check that VFD refrigerant isolation valves are | |
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| open. | |
8 | 219 | Heat Sink Over- | Heat sink temperature has exceeded the maxi- | Check VFD refrigerant cooling orifice and refrig- | |
temp | mum operating temperature | erant strainer. | |||
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| Check for proper VFD cooling fan operation and | |
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| air flow blockage. | |
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| Check that VFD refrigerant isolation valves are | |
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| open. | |
9 | 219 | Transistor Over- | The output transistors have exceeded the maxi- | Check VFD refrigerant cooling orifice and refrig- | |
temp | mum operating temperature | erant strainer. | |||
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| Check for proper VFD cooling fan operation and | |
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| air flow blockage. | |
12 |
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| The drive output current has exceeded the hard- | Check for high entering water temperature or low | |
286 | HW Overcurrent | condenser water flow. Check current settings in | |||
ware current limit. | |||||
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| VFD_CONF screen. | ||
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13 |
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| A current path to earth ground greater than 25% | Check the motor, motor terminals, and external | |
220 | Ground Fault | wiring to the drive output terminals for a | |||
of drive rating has occurred. | |||||
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| grounded condition. | ||
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14 | 206 | Ground Warning | The ground current has exceeded the level set in | — | |
P467 | |||||
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| To reset the processor, cycle power to chiller, | |
15 | 206 | Load Loss | If this fault appears, there may be a problem with | check ICVC VFD_CONF settings and save set- | |
software configuration. | tings when exiting VFD_CONF screen. | ||||
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| Check VFD parameters with Drive Explorer. | |
17 |
| The DC bus ripple |
| Check | |
216 | has exceeded a | Line Voltage imbalance | tribution bus voltage. Increase Line Voltage % | ||
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| preset level. |
| Imbalance in VFD_CONF screen. | |
20 | 206 | TorqPrv Spd Band | See VFD Fault Code 15 | See VFD Fault Code 15 | |
21 | 225 | Output PhaseLoss | The current in one or more phases has been lost | Check Motor Current % Imbalance in | |
or remains below a preset level. | VFD_CONF screen. | ||||
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| Verify input voltage is within drive specified limits. | |
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| The drive is not following a commanded decelera- | Verify system ground impedance follows proper | |
24 | 204 | Decel Inhibit | grounding techniques. | ||
tion because it is attempting to limit the bus volt- | Disable bus regulation P186 and/or add dynamic | ||||
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| age. | ||
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| brake resistor and/or extend deceleration time | ||
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| P537 and P538. | |
33 | 206 | AuRsts Exhausted | See VFD Fault Code 15 | See VFD Fault Code 15 | |
36 | 286 | SW Overcurrent | The drive output current has exceeded the 1 ms | Check for excess load, improper DC boost set- | |
current rating. | ting, DC brake volts set too high. | ||||
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20