Doppler DLC User manual
A DLC Error Guide
2020/April
A handbook for you
31 DLC Errors and how to fix them
This ebook is a quick troubleshooting guide to help
you address the most common errors of Doppler’s
DLC Board. Each fault
consists of the exact er-
ror you see at the board
screen, the cause and how
to solve it.
Get trainned through 31
common indications and
upgrade your team’s pro-
ductivity.
Happy reading!
Table Of Contents
»1 Stop Circuit Open–3
»6 Pass Time Overflow–4
»7 Door Cannot Open–5
»9 817 - 818 Are Open–6
»11 Counter Error–7
»12 Encoder Direction Error–8
»13 No Encoder Signal–9
»18 No Car Communication–10
»20 PTC/Thermistor–11
»21 HU - HD Are Open–12
»24 No shaft Learn–13
»25 Encoder Data Error–15
»26 Machine Room Temperature–16
»29 Contactor Failure–18
»31 Phase Order Wrong–19
»33 ML2 Open At Floor–20
»39 Group No Failure–21
»40 Door Contact Failure–22
»44 KL1 – KL2 Are Open–23
»45 SDB Bridging Error–24
»53 ML1 Open at Floor–25
»64 Brake Not Closed–26
»65 Brake Not Opened–27
»72 UCM Fault–28
»82 CNT Short Circuit–29
»84 ALSK / ALPK Not Present–30
»85 SDB 141 Fault–31
»86 Door Test Error–32
»87 Shaft Insp. Reset–33
»88 KL1 Shorted–34
»89 KL2 Shorted–35
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1 Stop Circuit Open
Stop circuit-120 (Speed regulator, parachute contact,
stop buttons…) is cut during motion.
Cause
Troubleshooting
1. During startup, check if the rectifier connections are tight
move the faston connectors.
2. Check the input of the rectifier at 55Vac from transformer and
the output 48Vdc.
3. If you have folding buers, check the door contacts (LHI for
low headroom is located to all floor doors except bottom floor
and LPI is for low Pit and is located to the bottom floor door
contact) and the safety relays led condition. they must have
3 leds lit each safety relay. The safety relay is activated if you
press RST button while the low pit and low headroom contacts
are closed (doors closed)
TIP: Check electrical drawings pages 2-5-7
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6 Pass Time Overflow
Pass Time Overflow 1-At fast speed, system cannot not
get new floor data within the time period defined at
[C08]. 2-At slow speed, system could not reach floor
level within the time period defined at [C09].
Cause
Troubleshooting
1. If you have counter with magnets, check the pencil switches MKU-
MKD. replace them if needed
2. If you have counting with pulses, then check if your pulses increase or
decrease abnormally. try to disconnect and reconnect encoder cable
connections both sides (motor-inverter)
3. Check if your RU-RD-RF-RH relays activate from the main board for
any combination of movement.
RU = relay UP Direction / RD = relay DOWN Direction / RF = relay FAST
SPEED / RH = relay HIGH SPEED. All these commands are giving to the
inverter the direction and the speed to move with a combination that
the main PCB decide.
4. Confirm that the maximum speed of the cabin is equal to the installa-
tion speed. If prelimits set to a position for 1m/s but the actual speed is
0,7m/s then this error may occur.
5. Check the prelimit switches height. The prelimits for 1m/s must set to
1,4m upper bottom floor level and same for higher prelimit 818.
6. If it is a traction lift, check if R140 relay gets active.
TIP: Check electrical drawings pages 3-12-13
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7 Door Cannot Open
After any door open command door contacts are not open within
the period defined at [C04] for door A or [C34] for door B.
Cause
Troubleshooting
1. Check if the lift had a power down. if yes then increase the
timers.
2. Check if the hook of the car door mechanism stuck - obstruct
to the hanging position. fix the hook and the base that the hook
insert position.
3. If you have 2 doors, check if the safety line and the door com-
mands are connected to the proper door position. A Door must
use 1000-KL1 / 125-130 for floor door / 130-135 for car door /
K0-KA-KK commands from the SCB board for open and close
/ fotocell A (FOT signal SCB). B Door must use 1000-KL2 / 120-
125 for floor door / 135-140 for car door / R12C-R1-R2 com-
mands from the SCB board for open and close / fotocell B (FT2
signal SCB)
4. Increase the maximum speed from the Doppler door drive
P3.03 for opening and P4.03 for closing 5hz each step.
TIP: Check electrical drawings pages 8-16-17
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9 817 - 818 Are Open
Up and down limit inputs (817=0 and 818=0) are both
open simultaneously.
Cause
Troubleshooting
1. Check the condition of the pre-limit switches. Press UP left
arrow in the main PCB and locate 817-818. Star indication is
showing the condition. In a middle floor both prelimits must
stay active if the limits hit the mechanical Cam, then Star sign
must disappear.
TIP: Check electrical drawings pages 4-12-13
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11 Counter Error
Inconsistency in floor number on displays and car posi-
tion. This error arises if the floor number is not 0 when
the car is at bottom floor (817=0 and 818=1) or floor
number is not top floor when the car is at top floor.
(817=1 and 818=0).
Cause
Troubleshooting
1. Check in error log if a power failure happened.
2. If no power loss happened, check the prelimits condition 817-
818 3). For a reason the system cannot reset. check if pulses
count normally if you use counting with pulses system.
3. Check if your pencil switches are working properly or if your
magnets are week.
TIP: Check electrical drawings pages 4-12-13
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12 Encoder Direction Error
Encoder rotation direction is not the same as the car
travel direction. Incremental encoder inputs A and B
(ENA and ENB) should be interchanged.
Cause
Troubleshooting
1. Change A- with B- and A+ with B+ (SP1 DLC1T/H) and try
again.
2. Check if all signals are tight and there is no broken or loose ca-
ble from the main board to the Drive.
TIP: Check electrical drawings pages 3-5
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13 No Encoder Signal
No encoder signal is received from encoder while the
car is moving within the time period defined [C29].
Check electrical connections of encoder circuit as well
as the mechanical coupling of the encoder.
Cause
Troubleshooting
1. Check the connections between DLC1 T/H from SP1 plug to
the inverter feedback cable for broken or loose connection.
2. Check if the microswitch of 5VDC or 15VDC is turned in 5 for
Gefran drive or in 15 for Doppler drive
3. Turn the lift in normal mode with Fsafety circuit braker in 0
position. check if there is an error in normal mode. delete the
error and try again.
4. Check if the cabin is moving during the procedure. if not,
check if the safety gear is engaged.
5. Check if speeds signals are moving across the flat cable to the
drive without obstructions in case of MRL panels. Or check if
the RU-RD-RH-RF are wrong.
TIP: Check electrical drawings pages 3-5
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18 No Car Communication
System cannot communicate with car units. Check se-
rial communication states of the main board and the
car controller. If BE or LE leds on CAN drivers are ON
then there is something wrong either in electrical wir-
ing of CAN units or in values of the termination resistors.
Check also parameter [A18]. It defines the CAN-channel
used for car circuit. You should connect car communi-
cation cables to the CAN-port denoted in [A18].
Cause
Troubleshooting
1. Check the connections From CH0-CL0 main PCB to CH-CL of
the ALPK or ALSK board and SCB car top controller board.
2. Remove the above boards one by one and check for any burns
to the back side of them.
3. Disconnect the floor LOPs from panel (they are connected to
the CH1-CL1 channel of the main PCB) they can aect the can
bus system of the main board.
TIP: Check electrical drawings pages 3-4-10
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20 PTC/Thermistor
Motor is overheated or PTC circuit is not connected
[PTC=0].
Cause
Troubleshooting
1. Check if R/N Circuit braker is giving output and RT2 relay is
active.
2. Check if T1-T2 on the ALSK or ALPK have continuity, if not,
check the motor thermistor. if the problem insists, contact after
sales service department.
TIP: Check electrical drawings pages 1-2-4
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21 HU - HD Are Open
When the system uses 3rd speed, [A11>0], mainly for
speeds above 1 m/s, then HU and HD inputs must be
used. If HU and HD are defined and both are open si-
multaneously then this error arises. Check HU and HD
switches, terminals, definitions and related wiring.
Cause
Troubleshooting
1. Check the HU-HD bi-stable switches height and condition.
2. In between floors both must be active with star. HD must have
no star to the bottom floor HU must have no star to the top
floor.
TIP: Check electrical drawings pages 4-12-13
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24 No shaft Learn
If incremental encoder is used as floor selector [A05=2]
and no shaft learning has been completed successfully
you will get this message on the screen. You should car-
ry out shaft learning to enter Normal operation mode.
This is only an information message.
Cause
Troubleshooting
1. You need to proceed to a shaft learning. Put the lift in inspec-
tion from 870 control between the two bottom floors.
2. Press M2-P9-RA.
3. Press an emergency STOP (from 870 control).
4. Turn into normal mode from 870 control.
5. Press ENTER to RA of the main board DLC.
6. Press UP arrow to DLC board.
7. If you see 1400 press ENTER.
8. If you see 300, make it 200 and press ENTER
9. Release emergency STOP from 870 control. After that, the lift
will go one floor up, one floor down, all the way up and finish
the learning with all way down. After the learning, the lift can
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do moves in normal mode.
When the shaft learning end, you make moves from floor to
floor to see if the lift reaches the floor level accurately.
If it does not then we check first the pencil magnets to be very
close to the magnets. If the problem still existing, then we
change the parameters in menu P4/K7.
MKU STOP/MKD STOP changing them apart. First MKU check-
ing from floor to floor and then MKD.
After that, the lift is ready to use in normal operation.
Troubleshooting (Continue)
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25 Encoder Data Error
Floor Pulse data stored in M8->E4>FLOOR PULSES menu
is missing or faulty. Shaft learning should be carried out.
Cause
Troubleshooting
1. The main board have a small switch to the right side set as 5V
at Gefran drive or 15V at Doppler drive. check if it is correctly
set.
2. Reset floor pulses and try shaft learn again.
3. Turn in normal operation with the safety line deactivated and
check if there is an external fault aecting the shaft learn.
4. If the shaft learning procedure stop in a magnet floor level for
no reason, check the magnets polarity to be the same in all
floors also check that the distance from pencil switches is not
higher than 15mm.
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26 Machine Room Temperature
This error message is raised if the machine room tem-
perature is outside the adjusted temperature region and
any new start of the lift is prohibited. [B21=0] clears ma-
chine room temperature detection. No checking is car-
ried out.
• If [B21=1] then checking MR temperature is carried
out with the detector on ALC main board.
• If the temperature around the main board is lower
than the value defined in parameter [B42] or greater
than the value defined in parameter [B43] then er-
ror 26 is created. Check the temperature around the
mainboard and the defined limits.
• If [B21=2] then checking MR temperature is carried
out by an external measuring device. The controller
reads its output through the terminal input [THR].
Cause
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29 Contactor Failure
Although there are no contactors activated, there is no
signal in CNT terminal. Check CNT wiring and definition.
Check also the wiring of the CNT circuit through nor-
mally closed aux-contacts of the contactors.
Cause
Troubleshooting
1. Check if there is a stuck contactor.
2. CNN is Neutral and CNT of the DLC1 T/H board feedback that
the Contactors K1-K2 and KF gets active. check the continuity
or the voltage to these contacts.
3. For hydraulic lifts, check KM-KD-KS and the thermal protection
Contactors.
TIP: Check electrical drawings pages 2-3
Table of contents
