PROGRAMMING
SINUS K
MANUAL
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A26 SW Running overcurrent
A32 Running overcurrent
Instant current limit at constant speed. This alarm trips in case of sudden load variations, output short–circuit or ground
short–circuit, disturbance and radiated interference.
SOLUTION: Make sure that no short–circuit is present between two phases or a phase and the grounding connection
at the inverter output (terminals U, V, W) (for a quick inspection, disconnect the motor and operate the inverter in no–
load condition).
Make sure that command signals are sent to the inverter through screened cables where required (see section 1.4
“WIRING” in the Installation Manual).
Check wiring and antidisturbance filters on contactor and solenoid valve coils installed in the cabinet (if any). Decrease
torque limit value if required (C42).
A28 SW Accel. overcurrent
A33 Accelerating overcurrent
Instant current limit while accelerating.
SOLUTION: See alarms A26 and A32. Alarm A33 may also trip when a too short acceleration ramp is programmed. If
so, set longer acceleration time periods (P05, P07, P09, P11, RAMPS submenu) and decrease BOOST and PREBOOST
(V/F PATTERN submenu, parameters C10 and C11, or parameters C16 and C17 if the second V/F pattern is used) for
IFD SW. Decrease torque limit value (C42) for VTC SW.
A29 SW Decel. overcurrent
A34 Decelerating overcurrent
Instant current limit while decelerating.
SOLUTION: This alarm trips if a too short deceleration ramp is programmed. If so, set longer deceleration time periods
(P06, P08, P10, P12, RAMPS submenu) and decrease BOOST and PREBOOST (V/F PATTERN submenu, parameters
C10 and C11, or parameters C16 and C17 if the second V/F pattern is used) for IFD SW. Decrease torque limit value
(C42) for VTC SW.
A27 SW Searching overcurrent (IFD SW only)
A35 Searching overcurrent (IFD SW only)
Instant current limit during speed searching stage due to opening and closing of ENABLE contact (terminal 6).
SOLUTIONS: Make sure that the command sequence is correct (see section 3.4 “SPEED SEARCHING)”.
A36 External Alarm
Opening of terminal 13 (MDI5) set as Ext.A with parameter C27 (IFD SW) or C21 (VTC SW).
SOLUTION: Find out the reason why the contact connected to terminal 13 opens during ordinary operation.
NOTE: The same alarm message is displayed when PTC opens (see section 1.1.4.14).
A40 Serial comm. error
The inverter in remote mode (C21 or C22=Rem for IFD software or C14 or C16=Rem for VTC software) has not
received valid messages from selian link for at least 5 seconds. The allarm is ON only if parameter C92 (IFD SW) or
C82 (VTC SW) "Watch Dog" is settled on [YES] and if ENABLE (terminal 6) is closed.
SOLUTION: If the inverter is remote–controlled by a master device, make sure that the master device cyclically sends at
least one legal message (“read” message or “write” message) within 5 seconds.
Not recognized failure
Unknown alarm.
SOLUTION: Reset the alarm. If the alarm condition persists, please contact ELETTRONICA SANTERNO’s AFTER–SALES
SERVICE.