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Pitagora 4.0 – Troubleshooting


List of faults with their description, cause and remedy.

This symbol means a blocking fault: switch off main power and then switch it on again to put the lift back in service.
1) – Reset
Description (and cause)
Power supply: the controller was restarted. For informational purpose only.
Furthermore, if there are devices that require a restart, it can present itself with the following specific codes.
Cod 9: 9 months without power cycle reset, lift continues to operate.
Cod 12: 12 months without power cycle reset, lift is out of service. Must be executed a POWER restart

Remedy
Cod 9 / 12 are present only in case of LM2 inverter or LIMAX3CP. Power restart is requested from these devices.
2) – Contactors blocked
Description (and cause)
One or more NC contacts associated to the power contactors and connected in series on the input CCO and CCOB remain open after the car stop.
Cod 0: CCO open
Cod 1: CCOB open
Cod 2: CCO+CCOB open

Remedy
Check:
1- the series of auxiliary contacts (NC) of the power contactors and other cables in series on the circuit CCO and CCOB
2- the CCO and CCOB circuit wiring
3- the connection of the CCO and CCOB on the board
3) – Low speed too long
Description (and cause)
Car moving at low speed for too long. In case of VVVF may be too low engine torque in the approching floor phase.

Remedy
Check:
1- Check parameter “Low Speed fault time” (“Configuration” menu) and increase time if necessary
2- the elevator speed to a low speed (in the case of VVVF); increase it if necessary
3a- the decelarating distance to the plane indicated (magnets / flags FAI / FAS)
3b- value of the distance R1D / R1S if Encoder is used (“System Positioning” menu)
4) – Overload
Description (and cause)
Overload input (SUR) activated (NO contact).

Remedy
Check:
1- the SUR input (if locked) and wiring
2- the setting of the load weighing device
5) – Positioning fault
Description (and cause)
This error shows a difference between the performed theoretical counting and the real position detected:
Cod 0: at the activation of the AGB/AGH limit contacts;
Cod 100: at the activation of ZP magnet floor
Cod 200:at the activation of stop level’s ZP magnet floor

Remedy
Check:
1- the correct positioning of the magnets (or flags)
2- operation of magnetic reeds, optical detector or encoder; verify the arrival of 24V current
3- the distance between extreme contact and magnet (or flag)
6) – Direction fault

Description (and cause)
The controller detects the wrong direction of travel.

Remedy
Check:
1- the direction of travel of the engine (control UP vs. Car movement direction)
2- the installation and connection of FAI / FAS sensors
3- CW / CCW Encoder configuration (“System Positioning” menu)
4- AGH and AGB inputs
7) – Safety 3 open at stop
Description (and cause)
Safety chain interrupted with elevator not running. Calls are deleted. On the PlayPad Led SE3 is off.

Remedy
Check all contacts between the terminals SC2 and SE3 (Safety Gear, Limit switch, Overspeed Governor).
9) – Door lock fault
Description (and cause)
Safety chain open at point SE6 when a call is registered.
With automatic door: door re-opens and then closes (3 times, after which all calls are cancelled).
Other door types: after a few seconds all calls are cancelled.
Cod 5: floor locks
Cod 6: car doo

Remedy
Check all contacts between the terminals SD2 and SD3 (floor locks) or SC4 and SC5 (car doors) according cod info, their connection and if an object obstructs the closing of the door to the indicated floor (POS).
In case of 81-21 devices check its contacts in Normal mode operations.
10) – Door A opening slippage
Description (and cause)
Only doors with limit switch: door does not open within the planned time. In case of slippage during door opening, the door is considered open.

Remedy
Check:
1- Door open limit switch (FOA) and its wiring;
2- door operator power supply and fuses;
3- door open contactors (ROA)
11) – Door B opening slippage
Description (and cause)
Same as door A, for second entrance.

Remedy
Same as A, but signals (FOB) and (ROB).
12) – Safety 3 open during travel
Description (and cause)
Safety chain open before Input SE3 while elevator car travelling. Car stops and elevator car calls are cancelled.
On the PlayPad Led SE3 is off.

Remedy
Check all contacts between the terminals
S35-S36 (Top of Car)
SC3-SM4 (controller)
Safety devices: Safety Gear, Limit switch, Overspeed Governor.
13) – Motor temperature sensor
Description (and cause)
Inputs TH1 or TH2 of motor temperature is activated (NC contact)
Cod 1: TH1 open
Cod 2: TH2 open
Cod 3: TH1 and TH2 open

Remedy
Check inputs (TH1, TH2), sensor connections and the state of the motor’s temperature sensor.
14) – Parameters memory

Description (and cause)
Fault in the Eprom parameters memory.

Remedy
Reset, re-enter and record all parameters.
15) – Final limit switch

Description (and cause)
When it is reached the final limit switch (or Safety Gear or Overspeed Governor limiter trip), the input SE3 is active (NC contact).
After delay of 1,5 s the error remains in memory, even after deactivation of the signal, and inhibits the landing calls and the elevator car movements, until special reset Menu “Errors” is made (Reset SE3).

Remedy
1- Release the final limit switch (or Safety Gear or OSG) closing the safety chain (SE3) and cancel fault in the “Faults” Menu.
2- Check the connection of the NC contact between SC2 and SE3 terminals
16) – Fire detection
Description (and cause)
In case of fire sensors installed, this fault indicates that one or more sensors are active.

Remedy
Check fire sensor input(s).
17) – Safety 4 open during travel
Description (and cause)
Safety chain open before input SE4 while elevator car travelling.
Landing calls and the elevator car movements are cancelled
On the PlayPad Led SE4 is off.

Remedy
Check all contacts between the terminals SD1 and SD2 (Preliminaries floor doors).
18) – Safety 6 open during travel
Description (and cause)
Safety chain open before Input SE6 while elevator car travelling.
landing calls and the elevator car movements are cancelled
On the PlayPad Led SE6 is off.
Cod 5: floor locks
Cod 6: elevator car door

Remedy
Check all contacts between the terminals SD2 and SD3 (floor locks).
Check all contacts between the terminals SC4 and SC5 (elevator car door).
Check all contacts between the terminals SC5 and SE6 (Protection device 81-21).
19) – Low tension during movement
Description (and cause)
Motherboard power below 17V (this fault disappears when the 24V is restored)
Cod 0: Main power Input
Cod 1: Overcurrent on VCAB
Cod 2: Overcurrent on VMR
Cod 3: Short Circuit on VCAB
Cod 4: Short Circuit on VMR

Remedy
Check the network, the supply voltage to the transformer primary, the presence of 24V and the consumption of the circuit.
20) – Travel interrupted
Description (and cause)
During upward (or downward) movements contactors open while RMO (or RDE) commands are active. Possible short interruption of the safety circuit while moving.
Cod 100: CCO signal falling during travel
Cod 200: CCOB signal falling during tavel

Remedy
Check:
1- Preliminary contacts and door lockers at the indicated floor
2- car door contacts
3- the supply voltage of the safety circuit
21) – CCO input blocked

Description (and cause)
The contactors control circuit (Input CCO) remains closed after travel command is given
Cod 100: CCO
Cod 200: CCOB
Cod 250: CTB not activated

Remedy
Check:
1- wiring and state of the auxiliary contacts (NC) of the power contactors and other NC contacts wired in series on the CCO / CCOB circuit
2- CCO / CCOB Motherboard input
22) – Low tension at stop
Description (and cause)
Same as Fault N.19
Cod 0: Main power Input
Cod 1: Overcurrent on VCAB
Cod 2: Overcurrent on VMR
Cod 3: Short Circuit on VCAB
Cod 4: Short Circuit on VMR

Remedy
Check the network, the supply voltage to the transformer primary, the presence of 24V and the consumption of the circuit.
23) – AGB blocked
Description (and cause)
The expected operation of AGB (NC) contact is not checked.
Cod 100: contact is not closed at floor different from bottom floor (downward calls erased).
Cod 200: contact is not open at lowest floor (lift locked)

Remedy
Check the condition of the contact AGB (mechanical switch or magnetic sensor) and the AGB circuit wiring.
24) – AGH blocked
Description (and cause)
The expected operation of AGH (NC) contact is not checked.
Cod 100: contact is not closed at floor different from top floor (upward calls erased).
Cod 200: contact is not open at top floor (lift locked)

Remedy
As for the error 23, regarding the AGH input.
25) – AGH and AGB simultaneously
Description (and cause)
Inputs AGB / AGH opened simultaneously. The system shuts down.

Remedy
Check the condition of AGH and AGB contacts (mechanical or magnetic) and their wiring.
When one of the two contacts is closed, the system performs a reset manoeuvre.
26) – Running time UP

Description (and cause)
No change in the beam status for motion sensors (or floor) for more than planned during car travel. In case of encodeur the threshold is 1 sec. over AGB/AGH limit point
Cod 0: problem on FAI FAS input (no changing of inputs for time longer than “Running time” parameter
Cod 100: problem on encoder channel
Cod 200: no changing of ZP input for time longer than “Running time” parameter.

Remedy
Check contactors, brake, motor power supply, FAI/FAS sensors (or ENCODER).
Check “X1” and “12” inputs of the VVVF. Anti-slippage test (See insights “Test and measurements).
27) – Running time DOWN

Description (and cause)
See above but in downward movement.

Remedy
See above but in downward movement.
28) – Door A closing slippage
Description (and cause)
Only doors with limit switch:
Door A does not close within programmed time.
3 complete opening/closing cycles are performed, then all registered calls are cancelled.

Remedy
Check:
1- door close limit switch FFA (NC contact) and wiring
2- door motor power supply and fuses
3- door close contactors (RFA)
29) – Door B closing slippage
Description (and cause)
Same as door A, for second entrance.

Remedy
Same as door A, but signals (FFB) and (RFB).
30) – Out of service switch
Description (and cause)
If the relevant parameter has been programmed, it indicates that the system has been put out of service through the activation of input HS.

Remedy
Check input HS (NO contact).
31) – FAI/FAS error
Description (and cause)
Simultaneous variation of FAI/FAS positioning sensors. POS [n] indicates that the error occurred at floor [n].
POS 100 indicates a wrong sequence of beams.

Remedy
Check power supply to sensors;
Check sensors and magnets position.
32) – Temporary operation without inspection
Description (and cause)
During temporary operations the input REV or REV1 or REV2 must be active or the lift will not move.

Remedy
Check input REV, REV1 or REV2 (NC contact).
33) – Stopping accuracy
Description (and cause)
When the lift stops at floor, the two FAI/FAS LEDs are on. If within 2 seconds from the stop one of the beams is interrupted, this fault occurs. If the system is equipped with ENCODER the uncertainty of the stop is more than 2 cm.

Remedy
Check:
1- position of the magnets (or flags);
2- deceleration distances;
3- motor brake
34) – Anti-nuisance
Description (and cause)
It appears after a call cancellation and if the parameter “Anti-nuisance” has been programmed.
The reason is too many calls from the elevator car without the cell being cut (in case of combined doors) or without landing doors opening (other door types).

Remedy
Change number of unwanted calls in the Anti-nuisance parameter.
35) – Lift not avalaible
Description (and cause)
The lift cannot take calls and is not considered for call dispatching (in multiplex). After 3 closing door cycles, the lift is considered unavailable for 1 minute.
Cod 10: No power on Car light
Only in multiplex:
Cod 100: light curtain / door open button
Cod 200: no SE4 signal (eg manual door not closed)

Remedy
36) – Phase sequence
Description (and cause)
Wrong sequence in input phases. Could be detected even during system shutdown.

Remedy
Check the right sequence of phases or swap two phases on power input terminals L1-L2-L3.
37) – Low battery
Description (and cause)
Low charge on 24V battery.

Remedy
Test battery charge or change battery.
38) – SE2 open
Description (and cause)
Safety chain open. Landing calls and the car movements are cancelled. Playpad SE2 led is off.
Cod 0: DIS switch open (SE0 led off)
Cod 1: PIT safety circuit open (SE1 led off)
Cod 2: TOC safety circuit open (SE2 led off).

Remedy
Check DIS Switch
Check all contacts between the terminals SP3 and SP4 (STOP in the pit, pit ladder, Inspection box, etc.).
Check all contacts between the terminals SC1 and SC2 (STOP on the Toc, Toc protection, Inspection box, etc).
39) – Ambient temperature
Description (and cause)
This error indicates that the ambient temperature detected by the sensor is outside the set limits.
Cod 100: Temperature below the lower threshold;
Cod 200: temperatures above the higher threshold.

Remedy
1 – Check the presence and connection of the temperature sensor.
2- Control activation, the threshold adjustment and sensor calibration can be made in the Special Features menu.
40) – Fault RSP

Description (and cause)
For reduced pit and headroom.
Cod 20: pit access according EN81.20
Cod 21 shaft access according EN81.21
Cod 111: Monitor Relay RSDC fail (contact doesn’t open)
Cod 121: reset circuit bi stable contact EN81.21 (automatic reset)
Cod 131: Bistabile circuit (relay RSR1)
Cod 132: Bistabile circuit (relay RSR2)


Remedy
Clear RSP parameter in the menu “Faults”.
Cod 111 check right working of relay RSDC
Cod. 121: check reset circuit. It could be possible automatic reset of bi stable contacts caused by problem on reset circuit. The contact series must be open and then make a standard reset.
Cod 131 (132) check right working of relsy RSR1 (RSR2) and after make the Reset procedure.
41) – Fault ISO

Description (and cause)
Problem detected in the operation monitoring of safety module for advanced door opening / re-leveling. If activated, the installation goes into “out of service” mode at the top floor (electric) or bottom floor (hydro).
Cod. 10: Monitor Relay RISO fail
Cod 100: fail on Safety module monitor during travel
Cod 200: fail on Safety module monitor at level

Remedy
Check the alignment of ISO1 and ISO2.
Reset ISO in the menu “Faults”.
42) – TOC Communication
Description (and cause)
No serial link between controller and elevator car (in case of elevator car serial link system configuration).

Remedy
Check CAN link between controller and top of elevator car board.
43) – Inspection
Description (and cause)
The system is in Inspection mode (NORM/ISP switch set to Inspection).

EN 81.1/2
Cod 1: REV input open (STD Version)
Cod 2: TOC’s REV1 input open
Cod 3: REV + TOC’s REV1 input open
Cod 5: REV input open (Pitagora version)
Cod 6: REV1 input open
Cod 7: REV + TOC’s REV1 input open

EN 81.20
Cod 11: PME inspection (REV)
Cod 12: TOC inspection (REV1)
Cod 13: PME + TOC inspection (REV + REV1)
Cod 14: PIT Inspection (REV2)
Cod 15: PME + PIT Inspection (REV + REV2)
Cod 16: TOC + PIT Inspection (REV1 + REV2)
Cod 17: PME + TOC + PIT Inspection (REV + REV1 + REV2)

Remedy
To exit the inspection mode move the NORM/ISP switch to Normal and close the safety chain to trigger the reset procedure.
44) – Re-levelling not completed
Description (and cause)
Hydraulic lifts: the re-levelling procedure was not completed within 10 seconds. All subsequent re-levelling requests at the same floor are inhibited.

Remedy
Check:
1- the correct operation of the Safety module and of its sensors ZP1 and ZP2;
2- Check the FAI/FAS or ENCODER sensors and the ZP sensor;
3- position of the magnets in the re-levelling zone;
4- RISO relay.
45) – Fault ZP
Description (and cause)
Door zone contact stays open when the sensor is in door zone position.

Remedy
Check the correct operation of the door zone sensor (if present);
See Fault # 33.
46) – Multiplex link interrupted
Description (and cause)
In multiplex systems, this fault indicates that the link between two or more controllers in the multiplex loop is missing. Every controller switch to SIMPLEX-like functioning.
Cod 0: cable wiring between controller
Cod 255: firmware problem

Remedy
Check the connection between the controllers (MULX board);
Check all multiplex settings.
47) – Faults memory
Description (and cause)
Errors in the faults memory.

Remedy
Erase all faults
48) – BDU link unavailable
Description (and cause)
In case of serial communication with floors, indicates the loss of link between the controller and all BDU modules at floors.
On BDUs
Green LED fast blinking (0,5 sec): OK
Green LED slow blinking (1 sec): OK BDU is not addressed
Red LED ON: BDU defective
Red LED slow blinking (1 sec): communication not established.
Red + Green LED slow blinking (1 sec): sync.

Remedy
Check:
1- BDU connector on screw terminals;
2- connection between the controller and the closest BDU;
3- the system configuration (“Configuration” menu)
49) – BDU fault
Description (and cause)
In case of serial communication with floors, indicates the loss of link between the controller and one or more BDU at floors.
On the BDU GREEN LED fast blinking (0,5 sec): OK
GREEN LED slow blinking (1 sec): OK BDU not addressed
RED LED ON: Faulty BDU
RED LED slow blinking (1 sec): no communication.
GREEN and RED LEDs slow blinking (1 sec): communication sync in progress.

Remedy
Check BDU functions and its connections;
Change defective BDUs;
Repeat addressing procedure.
50) – Drift control
Description (and cause)
Drift control (if provided) activation: the system is put out of service at an extreme floor.

Remedy
Reset 82212 in the menu “Faults”.
51) – Wrong Password
Description (and cause)
If the system has a password, this fault appears after entering the wrong password for three times.

Remedy
52) – Fault VVVF
Description (and cause)
A fault occurred in the inverter
Cod value is the subcode info of VVVF’s fault.

Remedy
Only in case of VVVF FUJI FRENIC LIFT.
53) – Fault UCM

Description (and cause)
UCM Circuit Fault:
Cod 2: Brakes open
Cod 3: Brakes closed in travel
Cod 4: Monitor error GMV NGV A3
RDY = RUN = OFF
Cod 5: Monitor error GMV NGV A3
RDY = RUN = ON
Cod 6: error Test two valves
Cod 8: error Test two valves (START ELEVATOR)
Cod. 10: Monitor SMA i-Valve fail (SMA not at 0V)
Cod. 11: Monitor SMA i-Valve fail (SMA not at 24V)
Cod 100: UCM Detection
Cod 201: RUCM1 Stucked Open
Cod 202: RUCM2 Stucked Open
Cod 203: RUCM3 Stucked Open
Cod 204: Monitor OSG A3 (stud stucked in extended position)
Cod 210: RUCM1 Stucked Close
Cod 220: RUCM2 Stucked Close
Cod 230: RUCM3 Stucked Close
Cod 240: Monitor OSG A3 (stud stucked in retracted position)

Remedy
Reset UCM in the menu “Faults”.
54) – Safety zone
Description (and cause)
Only for lift with no elevator car door and safety light curtains.
Cod 0: Light curtain active during travel (lift wait for a new Car call to restart)
Cod 1: Fail test CEDES door side A
Cod 2: Fail test CEDES door side B
Cod 10: Fail test on safety relay KSA
Cod 20: Fail test on safety relay KSB

Remedy
Check circuit according cod’s info..
55) – Fault SCS

Description (and cause)
Safety Circuit Shunt.
Function enabled by “Shaft Monitor” parameter. See annex X
Cod 2: Second contact door A shunted (FFA Signal).
Cod 4: Floor door contacts door A Shunted (SE4 input)
Cod 6: Car door contacts door A Shunted (SE6 input)
Cod 12: Second contact door B shunted (FFA Signal).
Cod 14: Floor door contacts door B Shunted (SE4 input)
Cod 16: Car door contacts door B Shunted (SE6 input)
Cod 100: No SE6 input during bypass (ISO Circuit)

Remedy
Check circuit according cod’s info.
Reset SCS parameter in the menu “Faults”.
56) – Fault UAS

Description (and cause)
Unintended Shaft Access
Function enabled by “Shaft Monitor” parameter.
Must be used BDU with additional door input (could be NO or NC).
System detect a manually floor door opening monitoring the auxiliary door input.
Cod 1: One Floor door manually open (with no open door command).
Cod 2: More than one Floor door manually open (at different floors)

Remedy
Reset UAS in the menu “Faults”.
57) – Bypass door
Description (and cause)
Only for EN 81-20.
Bypass active on door safety contacts.
(Moving enabled only in inspection)
Check also SM1 module monitor
Cod 1: Bypass Car active
Cod 2: Bypass Pre-Locks active
Cod 3: Bypass Locks active
Cod 100: Module SM1 locked

Remedy
Cod 100: Module SM1 is checked if only PME selector is active and no STOPS nor direction button pressed: in that condition module SM1 must be not enabled and SE3 input should be open.
58) – Overspeed
Description (and cause)
Only for Encoder positioning system.
In inspection or Temporary mode Lift’s speed is more than 0,63 m/s

Remedy
Check encoder parameters or inspection speed in “Positioning” menu.
59) – Fault SHI
Description (and cause)
Only for 81-21 Pre-triggered device.
Cod 0: Wrong feedback when pre-triggered device is not energized
Cod 255: Wrong feedback when pre-triggered device is energized
Manual protection:
Cod 101: Monitor Relay RMPP (contact doesn’t open)
Cod 102: Monitor Relay RMPP (contact doesn’t close)

Remedy
Check Pre-Triggered Device (or relay RMPP)
60) – Fault ELGO
Description (and cause)
ELGO Fault.
Cod 4: Pre-triggered Stopping system Top
Cod 5: Pre-triggered Stopping system Bottom
Cod 8: Normal mode overspeed (pre tripping)
Cod 9: Normal mode overspeed (final tripping)
Cod 11: Inspection mode overspeed (final tripping)
Cod 13: Teach mode overspeed (final tripping)
Cod 14: Normal mode overspeed (leveling)
Cod 15: Normal mode overspeed (re-leveling)
Cod 24: Unintended elevator car movement
Cod 100: ELGO not in operative mode
Cod 102: ELGO’s Input EN81-21 in Manual Teach mode
Cod 103: ELGO’s eSGC_POW missing in Manual Teach mode
Cod 104: Restarting error in Manual Teach mode
Cod 200: Communication time out
Cod 255: Magnetic Band missing

Remedy
Check ELGO configuration data.
Check ELGO wiring.
Make a Fault reset to remove the fault.

Test and measurements
Multiplex solutions
Timing diagrams
Fusion App

Updated on 25 Novembre 2021

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