If difficulties or problems are found in operating the system, we suggest consulting the possible causes and simple solutions presented in this unit. If this information is not enough to solve the difficulty, please contact Treetech’s technical assistance or its authorized representative.

1. The BM-HMI displays self-diagnostic messages on its display

Upon detecting a problem, the BM-HMI with actuate its self-diagnostic contact and display an Error screen, showing the code relative to the failure underway. The meaning of failure codes is shown on the following tables, respected the digit of the display where the code is exhibited. In the event of simultaneous failures, the number displayed by a given digit will be the sum of the individual Errors.
 

Figure 01 - Sef-diagnostic indication screen

Figure 02 - Detailing of self-diagnostic codes MM/IHM

The meanings of fault codes are shown in the following table, respecting the digit of the display in which the code appears. The indicator system of codes are in hexadecimal encoding, in which the allowed character set is S={0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F}. Individual errors are indicated by the set M = {1,2,4,8}. If simultaneous failures occur, the indicated number in a given digit will be the sum of the individual errors and is thus indicated by the additional set C = {3,5,6,7,9, A, B, C, D, E, F}. Below is a table with the possible combinations of errors in each digit

Table 01 - Table of possible assets errors combination

1.1. Self-diagnostic codes for the BM-HMI Interface

Table 02 - Self-diagnostic codes for the BM-HMI Interface

Code	Description	Probable causes	Actions recommended
0000	No failure	--	--
0001	RTD Measurement Overflow	Internal Failure	- Reset the BM-HMI by removing and reconnecting the power supply - If the action above does not clear the diagnostic indication or it happens again after a while, contact Treetech Technical Assistance
0002	Internal Error - Memory EEPROM
0004	Communication Error between micro-controllers
0010	Communication Error with Measurement Module 1 - BM-MM 1	Bad contact in communication cables between interface module and measurement module	Check for existence of bad contact or inversion in cables connected to terminals 20 and 21 of BM-HMI and terminals 4 and 5 of BM-MM 1
		Use of inadequate cables for communication connection	Use shielded, twisted-pair cable for connection between BMs
0020	Communication Error with Measurement module 2 - BM-MM 2	Bad contact in communication cables between interface module and measurement module	Check for existence of bad contact or inversion in cables connected to terminals 20 and 21 of BM-HMI and terminals 4 and 5 of BM-MM 2
		Use of inadequate cables for communication connection	Use shielded, twisted-pair cable for connection between BMs
		Measurement set 2 is enabled, but not in use	Disable this measurement module in parameter Number of sets
0040	Communication Error with Measurement module 3 - BM-MM 3	Bad contact in communication cables between interface module and measurement module	Check for existence of bad contact or inversion in cables connected to terminals 20 and 21 of BM-HMI and terminals 4 and 5 of BM-MM 3
		Use of inadequate cables for communication connection	Use shielded, twisted-pair cable for connection between BMs
		Measurement set 3 is enabled, but not in use	Disable this measurement module in parameter Number of sets
0080	Failure in temperature reading – sudden change, more than 5°C, between two consecutive temperature readings	Bad contact or disconnection in cables connected to interface module	Check for existence of bad contact along the entire path of the cable connected to interface module, BM-HMI, including connection to sensor and passage terminals
		Use of unshielded cables in the connection of sensors to BM-HMI	Check if three-way, shielded cable is being used in connecting RTD sensors to interface module, BM-HMI
		Shielding of connection cables from BM-HMI to sensors not grounded or grounded in more than point	Check that shielding of connection cables from BM-HMI to RTD sensors are grounded only on one end of the connection and the other end insulated
After checking and correcting the cause for the failure in the reading, reset the Error by pressing and holding andfor about 2 seconds. ATTENTION: when this reset is carried out, you will be informing the BM that the current temperature reading is correct
0100	Failure in reading from RTD A	Bad contact on cable connected to terminal 28 of the interface module	Check for existence of bad contact along the entire path of the cable connected to terminal 28 of the interface module, BM-HMI, including connection to sensor and passage terminals
		Failure of temperature sensor RTD A	Replace defective sensor Pt100
0200	Failure in reading from RTD B	Bad contact on cable connected to terminal 29 of the interface module	Check for existence of bad contact along the entire path of the cable connected to terminal 29 of the interface module, BMHMI, including connection to sensor and passage terminals
		Failure of temperature sensor RTD B	Replace defective sensor Pt100
0400	Failure in reading from RTD A	Bad contact on cable connected to terminal 26 and/or 27 of the interface module	Check for existence of bad contact along the entire path of the cable connected to terminal 26 and/or 27 of the interface module, BM-HMI, including connection to sensor and passage terminals
		Failure of temperature sensor RTD A	Replace defective sensor Pt100
		RTD A is not in use, but is enabled	Disable reading for this sensor in parameter RTD Configuration
0800	Failure in reading from RTD B	Bad contact on cable connected to terminal 26 and/or 30 of the interface module	Check for existence of bad contact along the entire path of the cable connected to terminal 26 and/or 30 of the interface module, BM-HMI, including connection to sensor and passage terminals
		Problem with jumper between terminals 26 and 27 of the interface module	Check for bad contact or absence of jumper between terminals 26 and 27 of the interface module, when option only RTD B has been selected
		Failure of temperature sensor RTD B	Replace defective sensor Pt100
		RTD B fora de uso, mas habilitado.	Disable reading for this sensor in parameter RTD Configuration

1.2. Self-diagnostic indications of the Interface Module - MM

The self-diagnostics present in the BM-MM is divided into 3 groupings, with the first grouping used for identification and the other 2 groupings used for error detailing.

Probable causes and recommended actions:

In general, BM-MM self-diagnostics caused by internal failures and the recommended actions are:  

1. Reset the BM-HMI by removing and reconnecting the power supply.
2. If the above action does not clear the diagnostic indication or this happens again after a while, contact Treetech technical support.

Exceptions:

For 0800 self-diagnostics - Phase sequence error:

Probable cause:

Bushings connected to the Measurement Module - BM-MM does not correspond to phases A, B, and C of that three-phase set.

Recommended actions:

Check the connection cables between TAP Adapters and BM-MM Measurement Modules. Each BM-MM Measurement Module must be connected to the TAPs for each of the three bushings in the three-phase set.

The tables below contain descriptions of the BM-MM self-diagnostics.

Table 03 - Indications grouping 1

Table 04 - Indications grouping 2

Table 05 - Indications grouping 3

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