5 System Commissioning 
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147
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2  Handling of faults E41, E42, E35, E51, E52, and E58 before commissioning at 
inspection speed
Fault handling before commissioning at inspection speed
fault Fault Name Fault Description Handling Method
E41
Safety circuit 
fault
1. At this fault, the elevator cannot 
run or be commissioned.
2. By default, the safety circuit 
input signal is connected to 
terminals X4 and X25.
Observe whether the signal 
indicator of input terminals X4 
and X25 is ON. If this indicator 
is OFF, the safety circuit is 
disconnected. In this case, 
you need to repair the safety 
circuit. Then, you can perform 
commissioning at inspection 
speed.
E42
Door lock circuit 
fault
1. At this fault, the elevator cannot 
run or be commissioned.
2. By default, the door lock circuit 
signal is connected to terminals 
X5, X26, and X27.
Observe whether the signal 
indicator of terminals X5, X26, 
and X27 is ON. If this indicator 
is OFF, the door lock circuit is 
disconnected. In this case, you 
need to repair the door lock 
circuit. Then, you can perform 
commissioning at inspection 
speed.
NEVER short the door lock circuit 
for commissioning.
E35
Shaft auto-
tuning data 
abnormal
This fault is reported at each 
power-on because shaft auto-
tuning is not performed. It does 
inspection speed.
Press 
 on the operation 
panel to hide the fault display.
Then, you can perform 
commissioning at inspection 
speed.
E51
CAN 
communication 
fault
1. 
commissioning at inspection 
commissioning at normal 
speed.
2. The COP indicator is OFF at this 
fault.
E52
HCB 
communication 
abnormal
1. 
auto-tuning and commissioning 
at inspection speed.
2. The HOP indicator is OFF at this 
fault.
E58
Shaft position 
switches 
abnormal
1. The elevator cannot run. You 
then perform commissioning at 
inspection speed.
2. The fault cause may be: The 
feedback inputs of both up and 
down slow-down switches 1 are 
active; feedback inputs of both 
up and down limit switches are 
active simultaneously.
1. Terminals X14 and X15 are 
connected to the slow-down 
switches 1 (NC input). Observe 
whether the signal indicators 
of both X14 and X15 are OFF. 
Check whether the slow-down 
switches 1 are connected to 
X14 and X15 and act properly.
2. Terminals X12 and X13 are 
connected to the up and down 
limit switches (NC input). 
Observe whether the signal 
indicators of both X12 and X13 
are OFF. Check whether the 
limit switches are connected to 
X12 and X13 and act properly.