Encoder connections should be checked. Motor
parameters should be checked.
Load balance of the elevator should be correct. The load
balance should be checked by adding the half load inside
the car.
“6: PID SETTINGS” parameters inside menu, Speed-
PID gains parameters may be adjusted.
The safety circuit should be checked. While the car is
moving, if the safety circuit is suddenly OFF, the car may
be speed-up.
➢ H24: UCM DETECTION ERROR
While the car is waiting at the floor level and its doors
are open, if it goes out of the door zone magnet, this error
is raised. ML1-ML2 magnetic switches need to be
checked. It is a permanent error and permanent error
clearing procedure must be applied as told in 11.1
numbered title. Otherwise, the elevator will be blocked.
➢ H25: EN SIGNAL IS NOT EXIST
In the systems which have synchronous motor, while the
motor starts moving, if "EN" signal doesn’t turn to ON
position, this error is raised.
After the move command, “EN” input on ARCUBE
should be 24V. While stopping, that signal should be cut.
➢ H26: BRAKE CHECK BACK ERROR
When motor brake is in the stop position, if there isn’t
24V signal on the input, and if there is still 24V signal
when the moving starts this error is raised. In the
synchronous motors, brake microswitches are monitored
over ARCUBE. When “5.23: MECHANICAL BRAKE
MONITORING” parameter is selected as
“ENABLED”, when the car stops, there should be 24V
signal on the monitoring input. While the car is moving,
the signal needs to be cut. When the same error is
repeated 2 times, it turns to permanent error and
permanent error clearing procedure must be applied as
told in 11.1 numbered title. Otherwise, the elevator will
be blocked.
Brake microswitch connections should be checked.
➢ H27: DC BUS VOLTAGE EXCEEDED
CRITICAL LEVEL
When the DC bus level reaches to the critical values, this
error is raised. L1, L2, L3 mains supply needs to be
checked. Brake resistor and its connections need to be
checked.
➢ H28: DOOR SAFETY CIRCUITS ARE
BRIDGED.
“DOOR OPEN” relay is activated by the controller when
the car stops at the floor level. If safety circuit (130-140)
is not cut after this relay is activated, this error is raised.
It is a permanent error and permanent error clearing
procedure must be applied as told in 11.1 numbered title.
Otherwise, the elevator will be blocked.
The safety circuit needs to be checked. When the doors
are opened, it should be observed that the safety circuit
signals are cut.
➢ H29: LOW SPEED ERROR
If the car speed is lower than the nominal value, this error
is raised.
The motor can’t reach the desired speed, motor
parameters and encoder connections need to be checked.
The load balance should be checked by adding half load
inside the car.
“6: PID SETTINGS” parameters inside menu, speed
PID gains need to be adjusted.
In asynchronous machines, if there is no error with the
open loop operation, encoder and ENCI board
connections need to be checked.
➢ H30: ML1, ML2 SIGNAL SEQUENCE IN
REVERSE.
While the car is moving in the up direction, if firstly ML1
signal is activated, this error is raised. While the car is
moving in the down direction, if firstly ML2 signal is
activated, this error is raised.
The connections of magnetic switches need to be
checked. It is a permanent error and permanent error
clearing procedure must be applied as told in 11.1
numbered title. Otherwise, the elevator will be blocked.
➢ H31: COUNTED DOOR ZONE NUMBER IS
WRONG.
During the shaft learning, if the number of ribbon
magnets inside the shaft is not the same as the number of
floor parameter, this error is raised.
“2.3: NUMBER OF FLOORS” parameter should be
checked.
The number of 30cm ribbon magnets inside the shaft
should be checked.
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