MTM 

Error messages and actions for MTM chargers

Error messages in alphabetical order and suggested actions 


CURR/VOLT-CODE

The programmed value of shunt or voltage code is not valid. 
Measures: Check and reprogram the shunt or voltage code. 


ACID CIRC. ERROR 

Only if acid circulation is activated Requires hardware. 
The air pressure was too high or too low during the main charging. The charging factor for standard battery is used. 
Possible causes: The air hose is not connected. Leakage. Folded hose. Air pump failure. 
Measures: Check airpump, connections and hoses. 


Ah-LIM. EXCEEDED 

The charged capacity exceeds the programmed value of battery capacity during the I1 or U1-phase. The I1 or U1-phase is terminated and the I2-phase is started. 
Possible causes: Incorrect value programmed. Warm battery. Faulty cell. Deep discharged battery. 
Measures: Check battery. Check programming. 


ALGORITHM ERROR 

Programmed value of charging curve is unknown for the charger. 
Measures: Program correct value in ”set charging algorithm” under ”service” 


BATT.ID UNKNOWN 

Only if IDB-function is activated. Requires hardware. 
The ID of the battery is unknown to the charger. 
Possible causes: The ID of the battery is not programmed. 
Measures: Read the battery ID and program the ID and its corresponding data into the memory. See separate instruction for the IDB system 


BATTERY FAULT dI 

Only if the function is activated in “Control register 1” 
The current is not decreasing during the U1-phase. The U1-phase is terminated and the I2-phase is started. 
Possible causes: Warm battery. Faulty cell. Other battery problems. 
Measures: Check the battery. 


BATTERY FAULT dU 

Only if the function is activated in ”Control register 1” 
The voltage is not increasing during the I1-phase. The I1-phase is terminated and the I2-phase is started. 
Possible causes: Warm battery. Faulty cell. Other battery problems. 
Measures: Check the battery. 


C/S ERR IDB-DATA 

The database storing the IDB-data is invalid or is not initiated. 
Possible causes: The computer pcb is new and is not base programmed. Programming is terminated in a wrong way (the charger is shut of during programming). 
Measures: If the IDB-system is in use, check the programmed values. Adjust incorrect values. Finish the programming by pressing # followed by a *. Turn the charger off and on again. 
If the IDB-system is not in use, use the function ”Clear all IDB data” under ”Service”. Then press * until the normal picture is shown. Turn the charger off and on again. 


C/S ERROR EEPROM 

Data stored in the EE-prom, or the corresponding checksum is incorrect. 
Possible causes: The computer pcb is new and is not base programmed. Programming is terminated in a wrong way (the charger is shut of during programming). 
Measures: Check and adjust programmed values. Reprogram at least one value. Finish the programming by pressing # followed by a *. Turn the charger off and on again.


CHARGER FAULT I^ 

The output current is momentarily to high. The charging is temporarily terminated and restarts after a moment. Repeated errors causes the charger to shut off permanently. Possible causes: Faulty thyristor. Faulty pcb. 
Measures: Check thyristors (see ”Checking diodes and thyristors”). Replace the main pcb. 


CHARGER FAULT I> 

The output current exceeds the programmed value. 
Possible causes: Faulty thyristor. Faulty main pcb. 
Measures: Check thyristors thyristors (see ”Checking thyristors and diodes ”). Replace the main pcb. 


CHARGER FAULT U^ 

The output voltage is momentarily to high. The charging is temporarily terminated and restarts after a moment. Repeated errors causes the charger to shut off permanently. Possible causes: Bad connection between the charger and the battery. Bad connection on the battery. Faulty thyristor. Faulty pcb. 
Measures: Check connections. Check thyristors (see ”Checking thyristors and diodes ”). Check and replace pcb. 


CONNECT BATTERY 

Battery is not connected or has a back voltage below 6V. 
Possible causes: Faulty battery. Bad connection. 
Measures: Check battery and connections. 


HARDWARE VER ERR 

Programmed value of ”hardware code” is out of range or invalid. 
Measures: Program a valid value (under ”service ”). 
N.b. the current program version does not display the programmed value of the hardware code. 


HIGH DC VOLTAGE 

The back voltage of the battery connected to the charger is higher than the programmed value in ”upper start limit”. 
Possible causes: The number of cells is to high. Wrong value in ”No. of cell”. Wrong value in ”upper start limit”. A newly charged battery is connected to the charger. 
Measures: Check the data plates on the battery and the charger. Check the programming. 


HIGH MAINS

The mains voltage is too high. 
Possible causes: The charger is connected to the wrong type of mains connection. Calibration error. 
Measures: Check the data plate of the charger. Check calibration. 


HIGH TEMPERATURE

When the internal temperature of the charger is to high, the output power is decreased. This message is shown when the output power is 0. 
Possible causes: Faulty fan. Covered vent openings. A lot of dust inside the charger. Faulty temperature sensors. High ambient temperature. 
Measures: Check and replace the fan. Free the vent openings. Clean the charger. Check and replace the sensor. 


I1-TIME EXCEEDED

The maximum time of the I1-phase is exceeded. The I1-phase is terminated and the I2-phase is started. 
Possible causes: Warm battery. Faulty cell. Deep discharged battery. Incorrect programming. 
Measures: Check the battery. Check the programming. 


IDB COM. ERROR 

Only if IDB-function is activated. Requires hardware. The data sent from the IDB-unit on the battery is invalid. 
Possible causes: Faulty IDB-unit. Faulty IDB-transceiver (inside charger). Long cables. 
Measures: Try to restart the IDB-unit by disconnecting its power. Replace IDB-unit or tranceiver.


IDB COM. TIMEOUT

Only if IDB-function is activated. Requires hardware. The charger is not able to communicate with the IDB-unit on the battery. 
Possible causes: Faulty IDB-unit. Broken fuse on the IDB-unit. Faulty IDB-transceiver (inside charger). Long cables. 
Measures: Try to restart the IDB-unit by disconnecting the power. Check the fuse in the plus cable of the IDB-unit. Replace IDB-unit or tranceiver 


I/O TYPE 1 ERROR 

The I/O-pcb is faulty or not connected. 
Possible causes: Incorrect programmed value in ”I/O pcb type”. Loosened flat ribbon cable between the I/O-pcb and the computer pcb. The I2C-transceiver (Ic11) on the computer pcb is faulty or missing. Faulty pcb. 
Measures: Check the programming. Check flat cable and Ic11.


LOW DC VOLTAGE

The back voltage of the battery connected to the charger is lower than the programmed value in ”lower start limit”. 
Possible causes: The number of cells is to low. Wrong value in ”No. of cell”. Wrong value in ”lower start limit”. The battery is deep discharged. Faulty cell. Bad connection. Measures: Check the data plates on the battery and the charger. Check the programming. Check the battery and it´s connections. 


LOW MAINS 

The mains voltage is too low. 
Possible causes: Power ”brown out”. Calibration error. Blown mains fuse. 
Measures: Check fuses and mains voltage. Check calibration. 


MAINS SYNC. ERROR

The charger can not synchronize to the mains frequency. 
Possible causes: Mains voltage interferences. Faulty pcb. 
Measures: Check mains. Replace pcb’s. 


MAX. OUTPUT

The current is zero or near zero in spite the charger is trying to deliver maximum power. 
Possible causes: Faulty thyristors. Faulty output fuse. Faulty pcb. 
Measures: Check thyristors (see ”Checking thyristors and diodes ”), output fuse and pcb’s. Replace broken components. 


OFFSET ERROR

I The output signal from the current sensor is outside the specified value when the charger is started. The offset current is measured before the thyristors are opened. 
Possible causes: Faulty pcb. Leaking or shorted thyristors. 
Measures: Disconnect the thyristors (see ”Checking thyristors and diodes ”). If the error remains, replace the main pcb and/or the processor p.c.b. 


OUTPUT SHORTED 

AGV-application. Only if the function is activated. Requires hardware. 
The charger senses a low inpedance on the output terminal.
Possible causes: Metal object on the floor contact. 
Measures: Remove object. 


OVER PRESSURE

Only if acid circulation is activated. Requires hardware. 
The air pressure is above the programmed value in ”Over pressure”. 
Possible causes: Folded air hose. 
Measures: Check air hoses. 


PHASE ERROR

Phase is missing. 
Possible causes: Blown mains fuse. Bad connection in mains plug or terminal blocks. Faulty contactor. 
Measures: Check mains fuses. Check connections. 


REMOTE MISSING

AGV-application.
The value in ”Remote config” is programmed for use of the remote start input and parking is not permitted. 
A battery is connected to the charger and the remote start signal is not activated. 
Possible causes: Bad connection in the remote start input. The programming of ”remote config” is not according to the desired function. Faulty proximity switch. 
Measures: Check connections and the proximity switch. Check programming. 


TRANSD. ERR T

The signal from the temperature sensor in the transformer or choke is out of range. 
Possible causes: Faulty sensor. Faulty pcb. 
Measures: Switch the connectors ”temp 1” and ”temp 2” in connector J7 on the main board. If the error follows the sensor, replace it. If the error follows the input channel, replace the main pcb. 


TRANSD. ERR Ty

The signal from the temperature sensor in the thyristor cooling fin is out of range. 
Possible causes: Faulty sensor. Faulty pcb. 
Measures: Switch the connectors ”temp 1” and ”temp 2” in connector J7 on the main board. If the error follows the sensor, replace it. If the error follows the input channel, replace the main pcb. 


TRANSD. ERR. IDB

Only if IDB-function is activated. Requires hardware. 
The IDB-unit reports a temperature out of range. 
Possible causes: Faulty battery temperature sensor (short circuit or bad connection). Faulty IDB-unit. 
Measures: Replace the sensor or the IDB-unit. 


TRANSD. ERR. PCB

The signal from the temperature sensor on the main pcb is out of range. 
Possible causes: Faulty pcb. 
Measures: Replace the main pcb. 


U1-TIME EXCEEDED

The maximum time of the U1-phase is exceeded. The U1-phase is terminated and the I2-phase is started. 
Possible causes: Warm battery. Faulty cell. Deep discharged battery. Incorrect programming. 
Measures: Check the battery. Check the programming 


UNDER PRESSURE

Only if acid circulation is activated. Requires hardware. 
The air pressure is below the programmed value in ”under pressure”. 
Possible causes: Leaking air connections. Broken air hoses. Faulty air pumps. 
Measures: Check air hoses, connections and airpumps.