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Below are the error codes and solutions for the Toshiba VF-S15 speed control device. Please carefully follow the redirect pages for detailed information on the error codes.

OC1 (Error Code) - Overcurrent during acceleration (More >)  
OC2 (Error Code) - Overcurrent during deceleration (More >)  
OC3 (Error Code) - Overcurrent during constant speed operation (More >)  
OCL (Error Code) - Overcurrent on load side at start-up (More >)  
EPH1 (Error Code) - Input phase failure (More >)  
EPH0 (Error Code) - Output phase failure (More >)  
OV1 (Error Code) - Overvoltage during acceleration (More >)  
OP2 (Error Code) - Overvoltage during deceleration (More >)  
OP3 (Error Code) - Overvoltage during constant-speed operation (More >)  
OL1 (Error Code) - Inverter overload (More >)  
OL2 (Error Code) - Motor overload (More >)  
OL3 (Error Code) - Main module overload (More >)  
OLr (Error Code) - Dynamic braking resistor overload trip (More >)  
Ot (Error Code) - Over-torque trip 1 (More >)  
Ot2 (Error Code) - Over-torque trip 2 (More >)  
OtE3 (Error Code) - Over-torque / Overcurrent fault (More >)  
UcE3 (Error Code) - Small-torque / Small-current fault (More >)  
OH (Error Code) - Overheat (More >)  
OH2 (Error Code) - Thermal fault stop command from an external device (More >)  
E (Error Code) - Emergency stop (More >)  
EEP1 (Error Code) - EEPROM fault 1 (More >)  
EEP2 (Error Code) - EEPROM fault 2 (More >)  
EEP3 (Error Code) - EEPROM fault 3 (More >)  
Erc1 (Error Code) - Main unit RAM fault (More >)  
Erc2 (Error Code) - Main unit ROM fault (More >)  
Erc3 (Error Code) - CPU fault 1 (More >)  
Erc5 (Error Code) - Communication error (More >)  
Erc9 (Error Code) - Remote keypad disconnection fault (More >)  
Uc (Error Code) - Low-current operation fault (More >)  
UP (Error Code) - Undervoltage fault (main circuit) (More >)  
Etn 0, Etn 1, Etn 2, Etn 3 (Error Codes) - Auto-tuning error (More >)  
EF 2 (Error Code) - Ground fault (More >)  
SOut (Error Code) - Step-out (for PM motor drive only) (More >)  
ELP YP (Error Code) - Inverter type error (More >)  
E-13 (Error Code) - Over speed fault (More >)  
E-18 (Error Code) - Analog input break detection fault (More >)  
E-19 (Error Code) - CPU communication error (More >)  
OLF (Error Code) - Over torque boost fault (More >)  
Erc7 (Error Code) - CPU fault 2 (More >)  
Erc8 (Error Code) - Optional unit fault 2 (More >)  
Erc9 (Error Code) - Internal circuit fault (More >)  
E-31 (Error Code) - Heavy cycle of main power ON/OFF (More >)  
E-32 (Error Code) - PTC fault (More >)  
E-37 (Error Code) - Servo lock fault (More >)  
E-39 (Error Code) - Auto-tuning error (PM motor) (More >)  

OFF (Alarm) - ST (assigned standby function) terminal OFF (More >)  
n0UFF (Alarm) - Undervoltage in the main circuit (More >)  
rtry (Alarm) - Retry in process (More >)  
Err1 (Alarm) - Frequency point setting error alarm (More >)  
trpC (Alarm) - Clear command acceptable (More >)  
E StOP (Alarm) - Emergency stop command acceptable (More >)  
H i t d I (Alarm) - Setting error alarm / An error code and alarm are displayed twice each (More >)  
H E r D1 End (Alarm) - Display of first/last data items (More >)  
db (Alarm) - DC braking (More >)  
Er 6 (Alarm) - Flowing out of excess number of digits (More >)  
Step 2 (Alarm) - Momentary power failure deceleration stop application mode prohibition (More >)  
init (Alarm) - Parameters are initialized (More >)  
A-01 (Alarm) - Points setting alarm 1 (More >)  
A-02 (Alarm) - Points setting alarm 2 (More >)  
A-05 (Alarm) - Output frequency upper limit (More >)  
A-07 (Alarm) - Operation panel key alarm (More >)  
A-27 (Alarm) - Terminal block connection alarm (More >)  
A-28 (Alarm) - SW1 terminal alarm (More >)  
Retn (Alarm) - Auto-tuning (More >)  
A-18 (Alarm) - Break in analog signal cable (More >)  
Fire (Alarm) - In forced operation (More >)  
PASS/FAIL (Alarm) - Password verification result (More >)  
EASY/FULL (Alarm) - Switching display of Easy setting mode / Standard setting (More >)  
SET (Alarm) - Input requirement of region setting (More >)  
nErr (Alarm) - No trip of past trip (More >)  
---- (Alarm) - No detailed information of past trip (More >)  

Prealarm Display (Blinking Alarms):

+ P: Overcurrent alarm  
+ O: Overvoltage alarm  
+ OL: Overload alarm  
+ H: Overheat alarm  
+ C: Communication fault 

>> VF-S15 User manual 

>> VF-S15 Faul codes 

>> Toshiba Homepage  

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