Omron 3G3RX2 Drive

Omron 3G3RX2 Drive Fault Codes:

Fault Code and Meaning	Cause and Remedy
E001 Overcurrent Error	Cause: A large current flowed in the inverter. 1. Steep load change or motor hunting during operation. 2. Insufficient acceleration/deceleration time or large load inertia. 3. Short circuit or ground fault in output lines. 4. Motor is locked. Remedy: Check for steep load changes; adjust response control [HA115]. Adjust IM motor capacity [Hb102] or poles [Hb103]. Increase acceleration [FA-10] or deceleration [FA-12] time. Check for short circuits or ground faults in the output wiring or motor. Check if the motor is mechanically locked. Clean cooling fans or ducts if occurred after long use.
E005 Motor Overload Error	Cause: Internal electronic thermal function detected motor overload. 1. Heavy load condition continued. 2. Thermal level set too high. 3. Insufficient acceleration/deceleration torque. Remedy: Re-examine operation conditions and load. Check motor thermal level setting [bC110]. Increase acceleration time [FA-10] or deceleration time [FA-12]. Adjust manual torque boost or control method [AA121]. Clean fans and ducts to reduce temperature.
E006 Braking Resistor Overload Error	Cause: Usage rate of braking resistor (BRD) exceeded the set limit [bA-60]. 1. Insufficient deceleration time. 2. Large load inertia or continuous regenerative operation. Remedy: Set longer deceleration time in [FA-12]. Re-examine the choice of resistor capacity. Check if external forces (like wind on a fan or crane lowering) are rotating the motor. Reduce the repetition cycle of operation.
E007 Overvoltage Error	Cause: P-N voltage exceeded approx 410 Vdc (200V class) or 820 Vdc (400V class). 1. Insufficient deceleration time. 2. Load inertia is too large causing regeneration. 3. Motor rotated by external force (fan, crane). 4. Power supply voltage abnormality. Remedy: Set longer deceleration time in [FA-12]. Use a braking resistor, braking unit, or regenerative converter. Check power supply voltage for fluctuations. If using drooping control with 2 motors, check for mutual interference (See P/PI switching).
E008 Memory Error	Cause: Built-in memory problem or CPU error. 1. Noise interference. 2. Power turned off during memory access. Remedy: Turn power OFF and ON again. Install noise countermeasures (shielding plates). Perform Inverter Initialization (See 6-1-2). If data cannot be restored, repair is required.
E009 Undervoltage Error	Cause: Main power supply voltage decreased (below ~160Vdc for 200V class or ~320Vdc for 400V class). 1. Power failure or unstable power supply. 2. Insufficient power supply capacity. 3. Internal circuit failure or capacitor deterioration. Remedy: Check power supply environment and voltage. If internal PS hasn’t fully turned off, use retry function. If frequent without power issues, the inverter may need repair.
E010 Current Detector Error	Cause: Problem with the built-in current detector. 1. Current detector circuit broken. 2. Noise source nearby. Remedy: Reset the inverter. If error recurs, repair is required. Take noise countermeasures (shielding).
E011 CPU Error	Cause: Malfunction in built-in CPU. 1. CPU broken. 2. Noise interference. 3. Data inconsistency during writing. Remedy: Perform a reset or power cycle. Perform initialization if recovered. If not recoverable, replace/repair the unit.
E012 External Trip Error	Cause: Signal from external device triggered trip. 1. Wiring wrong or terminal logic reversed. 2. External equipment commanded a trip. Remedy: Check external equipment status. Check assignment of external trip terminal. Verify NO/NC (a/b contact) settings.
E013 USP Error	Cause: Operation command entered when power was turned ON (when USP function enabled). Remedy: Release operation command before turning power ON. Wait 2 seconds after power ON to enter command.
E014 Ground Fault Error	Cause: Ground fault detected between inverter output and motor at power-on. 1. Ground fault in wires or motor. 2. Motor insulation deterioration. Remedy: Turn OFF power immediately. Disconnect motor wires and check motor/wiring insulation. Note: Do not turn power ON while checking.
E015 Incoming Overvoltage Error	Cause: High incoming voltage held for 100 seconds while output stopped. Remedy: Check power supply environment for high voltage or instability.
E016 Instantaneous Power Failure Error	Cause: Instantaneous power failure or voltage decrease in R, S, T. 1. Power supply voltage decreased. 2. Contact fault in breaker/contactor. Remedy: Check input power supply and breakers. Use retry function if caused by external power failure.
E019 Temperature Detector Error	Cause: Temperature detector circuit disconnection or failure. Remedy: Repair is required.
E020 Cooling Fan Speed Reduction Error	Cause: Fan rotation speed decreased causing high temperature. 1. Foreign object in fan. 2. Fan reached end of life. Remedy: Remove foreign objects. Replace the cooling fan.
E021 Temperature Error	Cause: Internal temperature is too high. 1. High carrier frequency. 2. Clogged heatsink fins. 3. High ambient temperature. Remedy: Lower carrier frequency. Clean the heatsink fins. Improve ambient cooling/ventilation. Check installation clearances.
E024 Input Open-phase Error	Cause: Phase loss detected in input line (when [bb-65]=01). 1. Loose connection or disconnection in input. 2. Single-phase input used erroneously. Remedy: Check input wiring and breaker terminals. Ensure three-phase connection is used. Tighten loose screws.
E030 IGBT Error	Cause: Instantaneous overcurrent or main element failure. 1. Short circuit or ground fault. 2. Output element failure. 3. Motor rotation locked. Remedy: Disconnect motor and check for short/ground faults. If element is broken, repair is required. Remove cause of motor locking.
E034 Output Open-phase Error	Cause: Phase loss detected in output line (when [bb-66]=01). 1. Loose connection or wire break to motor. 2. Internal motor disconnection. Remedy: Check output wiring and motor condition. Tighten terminals. Check for motor insulation breakdown.
E035 Thermistor Error	Cause: Abnormal temperature detected via external thermistor. 1. Motor overheating. 2. Improper thermistor setting or wiring. Remedy: Improve motor cooling environment. Reduce load. Check thermistor wiring and noise separation.
E036 Brake Error	Cause: Brake check signal problem during brake release waiting time. 1. Signal line disconnected. 2. Brake function setting incorrect. Remedy: Check wiring of brake check signal. Re-examine brake waiting time and terminal logic.
E038 Low-speed Range Overload Error	Cause: Output at low frequency (0.2 Hz or below) overload. Remedy: Reduce load at low speed. Select larger capacity inverter if frequent.
E039 Controller (Inverter) Overload Error	Cause: Electronic thermal function detected inverter controller overload. 1. Heavy load. 2. High load inertia. Remedy: Check load conditions and operation cycle. Increase acceleration/deceleration times. Clean fans/ducts.
E040 Keypad Communication Error	Cause: Timeout in communication with LCD Operator. 1. Loose connection. 2. Noise interference. Remedy: Check keypad wiring/connection. Install noise countermeasures.
E041 RS485 Communication Error	Cause: Timeout in RS485 (Modbus-RTU) communication. Remedy: Check RS485 wiring. Check for noise affecting communication lines.
E042 RTC Error	Cause: Real Time Clock battery low or data reset. Remedy: Replace the battery in the keypad. Reset the date/time.
E043 EzSQ Illegal Instruction Error	Cause: Invalid instruction in EzSQ program or noise corruption. Remedy: Rewrite the EzSQ program. Check for noise sources. Initialize inverter if needed.
E044 EzSQ Nest Count Error	Cause: Subroutine nesting exceeds 8 times. Remedy: Simplify program structure to reduce nesting.
E045 EzSQ Executive Instruction Error	Cause: Program flow error (e.g., missing “next” for “for”, division by zero, invalid parameter access). Remedy: Debug program structure (loops, calculations). Check range of parameters accessed by program.
E050 to E059 EzSQ User-assigned Errors	Cause: User-defined error triggered by EzSQ program instructions. Remedy: Check the content of the user program’s trip instructions.
E060 to E069 Option 1 Errors	Cause: Error in option mounted in Slot 1. 1. Option not securely mounted. Remedy: Check mounting state. Refer to specific option manual.
E070 to E079 Option 2 Errors	Cause: Error in option mounted in Slot 2. Remedy: Check mounting state. Refer to specific option manual.
E080 to E089 Option 3 Errors	Cause: Error in option mounted in Slot 3. Remedy: Check mounting state. Refer to specific option manual.
E090 to E093 STO Error / FS Option Error	Cause: Path error in functional safety circuit. Remedy: Refer to Section B (STO Function) of manual.
E100 Encoder Disconnection Error	Cause: PG option feedback lost. 1. Wiring disconnected. 2. Power loss to encoder. Remedy: Check encoder signal and wiring. Check encoder power supply.
E104 Position Control Range Error	Cause: Position counter exceeded range limits. Remedy: Recheck electronic gear setting. Check encoder mounting for slippage.
E105 Speed Deviation Error	Cause: Deviation between command and feedback exceeded limit [bb-83]. Remedy: Recheck load conditions. Check encoder mounting. Check electronic gear settings.
E106 Position Deviation Error	Cause: Position deviation exceeded limit [bb-86]. Remedy: Recheck load conditions. Check encoder mounting. Check electronic gear settings.
E107 Over-speed Error	Cause: Speed exceeded limit [bb-80]. Remedy: Check operation conditions and load. Check encoder constant settings.
E110 Contactor Error	Cause: Error in contactor sequence (COK signal missing). Remedy: Check wiring of input terminal function. Check contactor physical operation/response.
E112 PG Option Unit Connection Error	Cause: PG option unit removed or connection lost. Remedy: Check fixing screws of PG option. Check connector seating and dust.
E120 PID Abnormal Start Error	Cause: PID feedback did not reach target level during soft-start. 1. Target value too low. 2. Wires disconnected. Remedy: Adjust PID soft-start target level [AH-76]. Check wiring and PID feedback monitor.
Alarm: LIM Limiting Operation	Cause: Output is being limited by Overload, Torque, Overcurrent, or Overvoltage suppression. LIM Code 01: Overcurrent suppression / DC braking. LIM Code 02: Overload limit / Acceleration time too short. LIM Code 03: Overvoltage suppression / Deceleration time too short. Remedy: Reduce load or clean channels. Increase acceleration/deceleration times. Check for external forces rotating motor.
Alarm: ALT Advance Notice	Cause: Pre-warning level reached. ALT Code 01: Overload pre-warning. ALT Code 02: Motor thermal warning. ALT Code 03: Inverter thermal warning. Remedy: Remove factor for increased load. Clean cooling channels. Re-examine thermal settings.
Alarm: RETRY Retry Standby	Cause: Inverter is waiting to retry after a trip or power-off. Remedy: Wait for retry or adjust wait times [bb-26].
Alarm: NRDY Not Ready	Cause: Inverter cannot operate. Codes: Trip exists (01), Main power missing (02), Reset active (03), STO active (04), Internal check (05), Setting inconsistency (06). Remedy: Clear existing trips. Check main power R-S-T. Check Reset or STO terminal status. Check for parameter inconsistencies.