STP-301/451 Series Instruction Manual 
 
11-7
Troubleshooting 
11.2.3  Abnormalities When Powering ON 
Table 11.2    Troubleshooting after Powering ON
 
Symptom  Probable cause  Countermeasures  Refer to 
The "POWER" lamp does 
not illuminate, when 
powering ON. 
Incorrect connection of 
the power cable   
Connect the power cable 
correctly. 
6.4.2 
  Abnormal power voltage  Set the voltage to 100 to 
120V +/-10% (100V spec.) 
or 200 to 240V +/-10% 
(200V spec.). 
6.4.2 
13.2 
  Power failure  Check whether or not a 
power failure has 
occurred. 
10.1 
The breaker goes OFF 
when powering ON. 
Abnormal power voltage 
(200V is applied to the 
STP control unit of 100V 
spec.) 
Set the voltage to 100 to 
120V +/-10%. 
6.4.2 
13.2 
 
 
 
11.2.4  Abnormalities When Performing the STP Pump Start Operation 
Table 11.3  Troubleshooting When Performing the STP Pump Start Operation
 
Symptom  Probable causes  Countermeasures  Refer to 
The "ACCEL." lamp does 
not illuminate.   
LCD message 
(MANUAL operation only)
Press the "SELECT" 
switch one or more times 
until the LCD displays 
"LEVITATION" or 
"BRAKE ***00rpm". 
7.4.2 
 The 
"MANUAL/REMOTE" 
changeover switch is not 
at the correct position. 
Slide the 
"MANUAL/REMOTE" 
changeover switch to the 
correct position. 
6.1.1 
7.4 
7.5 
  Blown fuses (F1 to 4) for 
remote signal input 
(REMOTE operation only)
Replace the blown fuses.   
Contact Service office. 
8.2 
Malfunction 
Information
  Incorrect setting of 
DSW-B No.4 (only with 
CON4) 
Set the DSW-B No.4 to 
either "ON/OFF" 
according to the remote 
input connector/terminal. 
6.1.3 
7.5/7.6 
8.2/8.3