BRASCH GSE2-FG05 Generation 2 Standalone Detectors User Manual

: June 1, 2024
: BRASCH

Table of Contents

BRASCH GSE2-FG05 Generation 2 Standalone Detectors
Product Information
Product Usage Instructions
Frequently Asked Questions
Introduction
Failed Sensor – 960x
Cannot Run Self-Test – 9802
Control Panel
Miscellaneous
Replacement Parts
Appendix
Addressing
Troubleshooting Flowchart
Acceptable Measurements Reference
Limited Warranty
General Contact Information
References
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BRASCH GSE2-FG05 Generation 2 Standalone Detectors

BRASCHGSE2FG05-Generation-2-Standalone-Detectors-
product

Product Information

Specifications:

Manufacturer: Brasch Environmental Technologies, LLC
Model: GSE Generation 2 Standalone Detectors
Display: Four-by-seven segment display
Error Codes: 9501, 9601, 9602, 9603, 9604, 9802, 9995, 9996, 9997, 9998, 9999

Product Usage Instructions

Error Codes:

The Brasch GSE Generation 2 Gas Detector is programmed to display error codes to indicate problem conditions with the unit. Refer to the following error codes and their descriptions for troubleshooting:

Code	Description
9501	Transmit Timeout

Frequently Asked Questions

Q: How do I know if a sensor board has an end-of-life signal?

A: An end-of-life signal will be displayed on the detector base station’s four-by-seven segment display when the sensor has reached its end of life.

Introduction

This section covers the troubleshooting procedures for all GSE Generation 2 Standalone Detectors. These consist of Brasch models beginning with the prefix “GSE2”. Each detector base station is equipped with a four-by-seven segment display on which any error codes appearing during self-diagnostics will appear. Not all problems will result in an error code. See the appendix for board layouts, test points, and acceptable measurements.

Error Codes

The Brasch GSE Generation 2 Gas Detector is programmed to display error codes to indicate a problem condition with the unit.

Code	Description
9501	Transmit Timeout
9601	Failed Communication with Sensor 1
9602	Failed Communication with Sensor 2
9603	Failed Communication with Sensor 3
9604	Failed Communication with Sensor 4
9802	Cannot Run Self-Test
9995	Sensor End-of-Life Signal
9996	Sensor Not Installed
9997	Invalid Calibration Values
9998	No Active Zones
9999	No Active Sensors

Transmit Timeout – 9501

Problem: The control board is not able to send a signal on the communication line.
Checks: None
Solution: Replace the control board.

Failed Sensor – 960x

Problem: The control board cannot establish communication with one or more of the sensor boards.

Checks:

Power
- a) Green power LEDs illuminate
- b) Sensor boards have between 20 and 28 VAC for incoming power
- c) Sensor board fuses F1 and F2 should have continuity
- d) Voltage between TP4 and TP3 on the sensor board should be 5 VDC
- e) Voltage between TP2 and TP3 on the control board should be 5 VDC
Wiring
- a) Wiring connections are terminated properly between the control board and sensor board(s)
- b) End-of-line termination resistor is present on remote sensors
Other
- a) Verify the address on SW1 matches the sensor number on the front sticker
- b) Connect remote sensors directly to the control board to eliminate the possibility of wiring issues
- c) Check resistance between TP4 and TP3 on the sensor board for shorts
- d) Check resistance between TP2 and TP3 on the control board for shorts

Solutions:

Power
- a) Incoming power to the sensor board must be > 20 VAC and < 28 VAC. It is rated for 24 VAC ± 3 VAC but can withstand slightly higher or lower voltages. Too low a voltage and the sensor will not power or communicate. Too high a voltage and the board may suffer damage. As power comes from the control board, improper power at the sensor board indicates the control/interface boards may need to be replaced.
- b) In the event of overload, the sensor board fuses are designed to blow and protect the circuitry. A spare F1 fuse is included with each detector for this case.
- c) Higher/lower voltage on the test points indicates damage to the regulators. If this is the case, the control/sensor board must be replaced.
Wiring
- a) If the brown and blue wires are flipped or not connected, communication will fail. Communication wires must be securely connected to the correct terminals for communication to work.
- b) Any voltage that gets on the communication wires will interrupt communication. Likewise, grounding the communication wires will also interrupt communication. Provided the board is not damaged, isolating the communication wires will resolve the issue.
- c) A termination resistor is not always necessary, but it can help to prevent signal reflections from interrupting communication.
Other
- a) Multiple sensor boards with the same address will cause communication failure on both sensors. Ensure each sensor board has a unique address at SW1. Ensure the control board has these addresses set as active on SW3.
- b) If any fuses are blown, replace the fuse.
- c) If resistance at the 5 V test point is < 500 Ω, communication will be compromised. This indicates a short on the 5 V rail which most often occurs through the RS485. If the short is present on the sensor board, replace the sensor board. If the short is present on the control board, replace the control board.

Cannot Run Self-Test – 9802

Problem: The self-test sequence failed to run in its entirety.

Checks:

High Gas Concentrations
- a) Restart the detector, allow it to finish its warm-up sequence, and verify that the gas readings on all sensors are below the low alert level.
Error Conditions
- a) Restart the detector, allow it to finish its warm-up sequence, and verify that no error codes are present.

Solutions:

High Gas Concentrations
- a) If the gas concentration is above the Low Alert setpoint, the self-test will fail. Increase the ventilation and/or wait for the concentration to drop low enough before running the self-test.
Error Conditions
- a) If there is an error condition present, resolve the error. Then run the self-test. The most common errors that cause this condition are a missing sensor or a communication loss.

End-of-Life – 9995

Problem: The sensor board clock has expired, indicating the sensor has reached the expected end of its useful lifetime.
Checks: Verify the date of manufacture is approximately 10 years ago.
Solutions: Replace the sensor board if it has reached end-of-life. If this error is unreasonable, short the status (TP5) and +5V (TP4) test points together for approximately 2 seconds to reset the clock.

Sensor Not Installed – 9996

Problem: The sensor board does not detect the presence of a sensor.
Checks: Verify that there is a sensor on the sensor board and that it is fully seated in its socket.
Solution: Press the sensor firmly into the socket. Pay special attention to SW2 (at the 3 o’clock position of the sensor) as it is responsible for detecting the sensor. If the switch is bent or broken, it may be necessary to create a shim on the bottom of the sensor or to replace the sensor board if this is not possible.

Invalid Calibration Values – 9997

Problem: Zero and span values are not saved in memory.
Checks: None
Solution: Perform a full calibration on the sensor. If the calibration fails and the error persists, replace the sensor board.

No Active Zones – 9998

Problem: The sensors are not assigned to a zone.
Checks: None
Solution: Replace the control board.
No Active Sensors – 9999
Problem: No sensors are selected as active on SW3.
Checks: None
Solution: Set at least one active sensor on SW3 and restart the detector.
Miscellaneous

Power Loss – Base Station

Problem: The main detector does not power ON.

Checks:

Power
- a) Verify that the incoming voltage matches the input requirements
- b) Check that all wires are secure in the correct terminals
- c) Check that all harnesses are firmly connected
Switches
- a) Ensure the power switch is in the ON position
- b) Verify that any disconnect switches and circuit breakers are ON
Fuse
- a) Check for continuity across the main power fuse (F1)

Solutions:

Power
- a) Input voltage below the rated limit will be insufficient to run the detector. Correct the source and reapply power.
- b) Input voltage above the rated limit will cause damage. Correct the source, then check the fuse – replacing if necessary. Reapply power to check for damage. The control board may need to be replaced.
- c) Any wires/harnesses that are loose or disconnected should be fixed. Replace the wire/harness if necessary.
Switch
- a) If any switches (disconnect, breaker, or detector) are OFF, make sure it is safe to apply power, then flip the appropriate switches ON.
Fuse
- a) Blown fuses will measure OL. A spare main fuse is included with each detector. Replace the fuse and check for power.

Power Loss – Sensors

Problem: One or more sensors do not power ON (but the control board does).

Checks:

Power
- a) Verify the incoming voltage is ~33 VDC
- b) Check that all wires are secure in the correct terminals
- c) Check that all harnesses are firmly connected
Fuse
- a) Check for continuity across the main fuses (F1 and F2)

Solutions:

Power
- a) If the incoming voltage is too high or low, replace the control board.
- b) Any wires/harnesses that are loose or disconnected should be fixed. Replace the wire/harness if necessary.
Fuse
- a) Blown fuses will measure OL. A spare F1 fuse is included with each detector. F2 is rarely affected. Replace the fuse and check for power.

Low Alert Relay Operates on a Schedule

```
* Problem: The low alert relay closes for 15 minutes, then opens for 45 minutes each hour.
```
- Check: Verify the firmware version of the control board.
- Solution: Control boards with v 1.0 must be updated to v 1.1 to eliminate the 15/45 mode.

Equipment Runs Constantly

Problem: Ventilation or warning equipment connected to one or more of the detector relays runs constantly.
Check: Verify the relay opens and closes with the self-test mode. Solution: If the relay opens and closes during self-test, the manual override may need to be disengaged by pressing the appropriate button on the front cover of the detector. If the relay state does not change, replace the control board and/or interface board.

Equipment Activates at the Wrong Time

Problem: Ventilation or warning equipment does not activate when desired.
Check: Verify the equipment is connected to the appropriate relays and that the alert/delay settings are as desired for the Low Alert.
Solution: Move the equipment wiring to the correct relay terminals and adjust the alert/delay settings as needed. Restart the detector once any settings changes are made.

Equipment Does Not Activate

Problem: Ventilation or warning equipment does not activate at all.

Check:

Detector
- a) Verify the equipment is connected to the appropriate relays
- b) Check that sensors are configured to the correct zone on the control board (SW4)
- c) Run the self-test to verify relay operation
- d) Measure relay fuses to check for blown fuses
Ventilation/Warning Equipment
- a) Verify the equipment is wired properly
- b) Ensure the equipment has the proper input voltage

Solution:

Detector
- a) Equipment connected to the wrong relays or zones will not be activated by the detector. Fix wiring connections and/or change the settings on the control board to resolve the issue.
- b) If any relay fuses are blown, verify that the equipment is not drawing too much current through the fuses. Relay fuses are only rated for 5 A @ 125 VAC. External relays, motor starters, contactors, etc. may need to be installed.
- c) If the relay state never changes during the self-test mode and the relay fuse is intact, replace the control and/or interface board.
Ventilation/Warning Equipment
- a) Detector relays are dry contacts and do not provide control voltage. If equipment requires voltage, this must be properly supplied and routed through the relays.

Low Alert Disengages with High Alert

Problem: Equipment shuts down when gas levels continue to rise above the High Alert level.
Check: Verify the position of the fan speed jumpers (JP5 and JP10).
Solution: Move the jumpers to the upper two pins on both JP5 and JP10 to select 50/100
operation.

Proportional Output Provides the Wrong Signal

Problem: The proportional output provides the wrong signal.
Check: Verify the jumpers on JP2 and JP3 match the desired setting.
Solution: Move the jumpers on JP2 and JP3 to the desired setting.

Proportional Output Provides a Constant Signal

Problem: The proportional output provides a constant signal.

Check:

Settings
- a) Verify that JP2 is set to the appropriate set of pins (mA or Volts)
- b) Verify that JP3 matches the units on JP2
Power
- a) Verify that the sensor board has power
- b) Measure voltage/resistance between TP4 and TP3
- c) Measure voltage between TP7 and TP3 while applying test gas

Solution:

Settings
- a) Move the jumper on JP2 to the desired setting
- b) If using the 4-20 mA output, JP3 must have the jumper on the middle set of pins
Power
- a) If the sensor board does not have power, the proportional output will not work. Troubleshoot the power loss and check again.
- b) If the sensor board has been damaged by shorting the 5 V to ground, the analog output will be constant. Replace the sensor board and ensure that no damage is being caused by the device connected to the proportional output prior to making any connections.
- c) If the voltage at TP7 does not change, neither will the proportional output. Verify the test gas and sensor operation.
1. If the test gas is wrong, try again using the correct setup.
2. If the sensor does not respond to gas, replace the sensor board.
- d) If the voltage at TP7 does change but the proportional output does not, replace the sensor board.

Gas Readings are Unsatisfactory

Problem: The detector does not register the desired concentration of target gas.
Check: Examine the calibration date on each sensor.
Solution: Recalibrate any sensors or replace sensor boards as required.

Control Panel

Introduction

This section covers the troubleshooting procedures for the GDCP-Touch Multi- Zone Control Panel and associated products. These consist of Brasch models beginning with the prefix “GDCP”. Each control panel is equipped with a 7” touchscreen display on which any error messages appearing during self- diagnostics will appear. Not all problems will result in an error message. See the appendix for board layouts, test points, and acceptable measurements.

Error Messages

The GDCP-Touch is programmed to display error messages to indicate a problem condition with the unit. The bottom center of the Home Screen will scroll through each message present. When an error occurs, the alarm will chirp and a silence button will replace the calendar icon to allow a user to mute the alarm. Any associated Level 1 relays (if able) will activate during an error state.

Relay # – Manual Override Active

Problem: The relay is stuck in either the open or closed position due to a manual override being active.

Checks: None
Solution: Go to Settings > Relay Settings > Relay # and set the override to “None”.

Sensor # Communication Loss

Problem: The control panel cannot establish communication with one or more of the sensor boards.

Checks:

Power
- a) Green power LEDs illuminate
- b) Sensor boards have between 20 and 28 VAC for incoming power
- c) Sensor board fuses F1 and F2 should have continuity
- d) Voltage between TP4 and TP3 on the sensor board should be 5 VDC
- e) Voltage between TP4 and TP3 on the relay board should be 5 VDC
Wiring
- a) Wiring connections are terminated properly between the relay board and sensor board(s)
- b) End-of-line termination resistor is present on the final remote sensor
- c) End-of-line termination resistor is switched ON at each relay board
- d) Bias resistors are in the appropriate positions on each relay board
- e) Wires are not flipped between system components (i.e., +/- 24 VAC, +/- COMM)
Other
- a) Verify the address on SW1 matches the sensor number on the front sticker
- b) Connect remote sensors directly to the relay board to eliminate the possibility of wiring issues
- c) Check resistance between TP4 and TP3 on the sensor board for shorts
- d) Check resistance between TP4 and TP3 on the relay board for shorts
- e) Check resistance between +COMM and -COMM
- f) Check resistance from +COMM to COM and from -COMM to COM

Solutions:

Power
- a) Incoming power to the sensor board must be > 20 VAC and < 28 VAC. It is rated for 24 VAC ± 3 VAC but can withstand slightly higher or lower voltages. Too low a voltage and the sensor will not power or communicate. Too high a voltage and the
- board may suffer damage.
- b) In the event of overload, the sensor board fuses are designed to blow and protect the circuitry. A spare F1 fuse is included with each control panel for this case.
- c) Higher/lower voltage on the test points indicates damage to the regulators. If this is the case, the relay/sensor board must be replaced.
Wiring
- a) If the brown and blue wires are flipped or not connected, communication will fail. Communication wires must be securely connected to the correct terminals for communication to work.
- b) Any voltage that gets on the communication wires will interrupt communication. Likewise, grounding the communication wires will also interrupt communication Provided the board is not damaged, isolating the communication wires will resolve the issue.
- c) A termination resistor is not always necessary, but it can help to prevent signal reflections from interrupting communication.
- d) Bias resistors in the wrong position may prevent communication. Set all bias resistors ON for the relay board inside the control panel and OFF for the incoming communication side of any expansion packs.
- e) Flipped power wires will cause system components to be out-of-phase and can interrupt communication. Flipped communication wires will prevent communication from proceeding beyond the location where the flip occurs. In either case, ensure that each wire is connected to the same terminals throughout the system.
Other
- a) Multiple sensor boards with the same address will cause communication failure on both sensors. Ensure each sensor board has a unique address at SW1. Ensure the control panel has these addresses set as active in the Sensor Map.
- b) If any fuses are blown, replace the fuse.
- c) If resistance at the 5 V test point is < 500 Ω, communication will be compromised. This indicates a short on the 5 V rail which most often occurs through the RS485. If the short is present on the sensor board, replace the sensor board. If the short is present on the relay board, replace the relay board.
- d) If resistance is less than 60 Ω, evaluate the wiring to make sure that the communication wires are not crossed or making contact with each other. If resistance is approximately 120 Ω or greater, make sure that termination resistors are enabled/installed at either end of the communication line.
- e) When measured as part of the system, resistance should be > 500 Ω between ±COMM and COM. Both +COMM to COM and -COMM to COM should be close to the same value. If the resistance is too low, or if the values vary more than 5%, break the system down into smaller segments to isolate the source of the errant measurements.
- f) When measured as a single board, resistance should be > 100 kΩ between ±COMM and COM. Both +COMM to COM and -COMM to COM should be close to the same value. If the resistance is too low, or if the values vary more than 5%, replace the board.

Sensor # – Calibration Expired

Problem: A sensor’s internal timer has indicated that its expected calibration period has expired.
Check: Verify the manufacturing and calibration expiration dates on the front sticker.
Solution: Replace or recalibrate the sensor board. This error may be silenced for 6 months at a time by pressing the “Clear” button on the Home Screen if a calibration cannot (or does not need to) be performed.

Sensor # End of Life – Please Replace

Problem: The sensor board clock has expired, indicating the sensor has reached the expected end of its useful lifetime.
Checks: Verify the date of manufacture is approximately 10 years ago.
Solutions: Replace the sensor board if it has reached end-of-life. If this error is unreasonable, short the status (TP5) and +5V (TP4) test points together for approximately 2 seconds to reset the clock.

Sensor # Sensor Missing

Problem: The sensor board does not detect the presence of a sensor.
Checks: Verify that there is a sensor on the sensor board and that it is fully seated in its socket.
Solution: Press the sensor firmly into the socket. Pay special attention to SW2 (at the 3 o’clock position of the sensor) as it is responsible for detecting the sensor. If the switch is bent or broken, it may be necessary to create a shim on the bottom of the sensor or to replace the sensor board if this is not possible.

Sensor # Calibration Invalid

Problem: Zero and span values are not saved in memory.
Checks: None
Solution: Perform a full calibration on the sensor. If the calibration fails and the error persists, replace the sensor board.

Relay Board # Communication Loss

Problem: The control panel cannot establish communication with one or more of the relay boards.

Checks:

Power
- a) Power switch is in the ON position
- b) Green power LED illuminates
- c) Amber transmit LED illuminates
- d) Relay boards have between 18 and 28 VAC for incoming power
- e) Relay board fuse F1 should have continuity
- f) Voltage between TP4 and TP1 on the sensor board should be 33 VDC
- g) Voltage between TP4 and TP2 on the relay board should be 5 VDC
- h) Voltage between TP4 and TP3 on the relay board should be 5 VDC
Wiring
- a) Wiring connections are terminated properly at the relay board
- b) End-of-line termination resistor is switched ON
- c) Bias resistors are in the appropriate positions
- d) Wires are not flipped between system components (i.e., +/- 24 VAC, +/- COMM)
Other
- a) Verify the address on SW1 matches the designation at the control panel
- b) Connect expansion packs directly to the control panel to eliminate the possibility of wiring issues
- c) Check resistance between TP4 and TP3 on the relay board for shorts

Solutions:

Power
- a) With the power switch OFF, no communication will occur at or through the relay board. Make sure this switch is in the ON position at all times during operation.
- b) Incoming power to the sensor board must be > 20 VAC and < 28 VAC. It is rated for 24 VAC ± 3 VAC but can withstand slightly higher or lower voltages. Too low a voltage and the sensor will not power or communicate. Too high a voltage and the board may suffer damage.
- c) In the event of overload, the sensor board fuses are designed to blow and protect the circuitry. A spare F1 fuse is included with each control panel for this case.
- d) Higher/lower voltage on the test points indicates damage to the regulators. If this is the case, the relay/sensor board must be replaced.
Wiring
- a) If the brown and blue wires are flipped or not connected, communication will fail. Communication wires must be securely connected to the correct terminals for communication to work. Incoming communication should land at TS7 with outgoing communication at TS8 or TS11.
- b) Any voltage that gets on the communication wires will interrupt communication. Likewise, grounding the communication wires will also interrupt communication. Provided the board is not damaged, isolating the communication wires will resolve the issue.
- c) A termination resistor is not always necessary, but it can help to prevent signal reflections from interrupting communication.
- d) Bias resistors in the wrong position may prevent communication. Set all bias resistors ON for the relay board inside the control panel and OFF for the incoming communication side of any expansion packs.
- e) Flipped power wires will cause system components to be out-of-phase and can interrupt communication. Flipped communication wires will prevent communication from proceeding beyond the location where the flip occurs. In either case, ensure that each wire is connected to the same terminals throughout the system.
Other
- a) Multiple relay boards with the same address will cause communication failure on both relay boards. Ensure each relay board has a unique address at SW1. Ensure the control panel has these addresses set as active in the Relay Map.
- b) If any fuses are blown, replace the fuse.
- c) If resistance at the 5 V test points is < 500 Ω, communication will be compromised.
  This indicates a short on the 5 V rail which most often occurs through the RS485. If a short is present, replace the relay board.

SD Card Error – Insert SD Card

Problem: No microSD card is present.
Checks: None
Solution: Insert a microSD card into the slot on the back of the touchscreen assembly. If the error message does not clear, try a different microSD card. If the error message still does not clear, replace the SBC on the back of the display.

SD Card Error – Replace SD Card

Problem: The control panel cannot write data to the microSD card.
Checks: None
Solution: Replace the microSD card to clear the error.

Miscellaneous

Power Loss – Control Panel/Expansion Packs

Problem: The relay board does not power ON.

Checks:

Power
- a) Verify the incoming voltage is 18-28 VAC
- b) Ensure the power switch is ON
- b) Check that all wires are secure in the correct terminals
- c) Check that all harnesses are firmly connected
Fuse
- a) Check for continuity across the main fuse (F1)

Solutions:

Power
- a) If the incoming voltage is too high or low, replace the relay board.
- b) Make sure the power switch is in the ON position at all times during operation.
- c) Any wires that are loose or disconnected should be fixed. Replace the wires if necessary.
Fuse
- a) Blown fuses will measure OL. A spare F1 fuse is included with each control panel. Replace the fuse and check for power.

Power Loss – Sensors

Problem: One or more sensors do not power ON (but the control board does).

Checks:

Power
- a) Verify the incoming voltage is ~33 VDC
- b) Check that all wires are secure in the correct terminals
- c) Check that all harnesses are firmly connected
Fuse
- a) Check for continuity across the main fuses (F1 and F2)

Solutions:

Power
- a) If the incoming voltage is too high or low, replace the control board.
- b) Any wires/harnesses that are loose or disconnected should be fixed. Replace the wire/harness if necessary.
Fuse
- a) Blown fuses will measure OL. A spare F1 fuse is included with each detector. F2 is rarely affected. Replace the fuse and check for power.

Black Display with Power On

Problem: The relay board has power but the display is still black.

Checks:

Verify the display power cable is connected to both the connector on the relay board and the barrel plug on the back of the touchscreen
Ensure the negative wire in the power cable goes to the bottom pin of the display power connector
Check that the boot switch is set to “eMMC” and not “μSD”
Look for blue lights on the back of the touchscreen
Look for a green light on the front of the touchscreen (but behind the door)

Solutions:

The display power cable must remain connected at all times during operation.
If the wires are flipped on the display power cable, replace the cable with a new, correct cable. Alternatively, use a small prying tool to depress the pins in the connector and release the wires. Then insert them back into the connector with the correct orientation.
If the boot switch is in the wrong position, flip the switch and cycle power.
If no blue lights are present, replace the touchscreen assembly.
If blue lights are present but no green light is present, attempt to update the control panel firmware. If this update does not succeed, replace the touchscreen assembly.

Equipment Runs Constantly

Problem: Ventilation or warning equipment connected to one or more of the control panel relays runs constantly.
Check: Verify the relay opens and closes with the self-test mode.
Solution: If the relay opens and closes during a manual override, either change the relay level or exchange the wires between NO and NC.

Equipment Activates at the Wrong Time

Problem: Ventilation or warning equipment does not activate when desired.
Check: Verify the equipment is connected to the appropriate relays and that the alert/delay settings are as desired.
Solution: Move the equipment wiring to the correct relay terminals and adjust the alert/delay settings as needed.

Equipment Does Not Activate

Problem: Ventilation or warning equipment does not activate at all.

Check:

Control Panel
- a) Verify the equipment is connected to the appropriate relays
- b) Check that sensors are assigned to the appropriate zones
- c) Use manual override to verify relay operation
- d) Measure relay fuses to check for blown fuses
- 1. Ventilation/Warning Equipment
- a) Verify the equipment is wired properly
  b) Ensure the equipment has the proper input voltage

Solution:

Control Panel
- a) Equipment connected to the wrong relays or zones will not be activated by the control panel. Fix wiring connections and/or change the settings to resolve the issue.
- b) If any relay fuses are blown, verify that the equipment is not drawing too much current through the fuses. Relay fuses are only rated for 5 A @ 125 VAC. External relays, motor starters, contactors, etc. may need to be installed.
- c) If the relay state never changes during a manual override and the relay fuse is intact, replace the relay board.
Ventilation/Warning Equipment
- a) Control panel relays are dry contacts and do not provide control voltage. If equipment requires voltage, this must be properly supplied and routed through the relays.

Relays Deactivate when Other Relays Activate

Problem: Equipment shuts down when gas levels continue to rise above a higher setpoint.
Check: Verify the relay level of each relay in Relay Settings.
Solution: Any equipment that should remain active at the same time must be connected to relays of the same level. Adjust the relay levels as necessary.

Proportional Output Provides the Wrong Signal

Problem: The proportional output provides the wrong signal.
Check: Verify the jumpers on JP1 match the desired setting.
Solution: Move the jumpers on JP1 to the desired setting.

Proportional Output Provides a Constant Signal

Problem: The proportional output provides a constant signal.

Check:

Settings
- a) Verify that JP1 is set to the appropriate set of pins.
Power
- a) Verify that the relay board has power
- b) Measure voltage/resistance between TP4 and TP3
- c) On a sensor board, measure voltage between TP7 and TP3 while applying test gas

Solution:

Settings
- a) Move the jumper on JP1 to the desired setting
Power
- a) If the relay board does not have power, the proportional output will not work.
  Troubleshoot the power loss and check again.
- b) If the relay board has been damaged by shorting 5 V to GND, the proportional output will not change. Replace the relay board and ensure that no damage is being caused by the device connected to the proportional output prior to making any connections.
- c) If the voltage at TP7 does not change on a sensor board, neither will the proportional output. Verify the test gas and sensor operation.
1. If the test gas is wrong, try again using the correct setup.
2. If the sensor does not respond to gas, replace the sensor board.
- d) If the voltage at TP7 does change but the proportional output does not, replace the sensor board.

Gas Readings are Unsatisfactory

Problem: The control panel does not register the desired concentration of target gas.
Check: Examine the calibration date on each sensor.
Solution: Recalibrate any sensors or replace sensor boards as required.

Replacement Parts

Below is a list of parts that may be replaced inside Brasch products. Please consult your local Brasch representative for pricing and availability.

Model Prefix	Part Number	Part Description

GSE2

GDCP

| GDCP-F5A| 5 A, 250 VAC Relay Fuse
GDCP-F025A| 0.25 A, 250 VAC Secondary Fuse
GDCP-F1A| 1 A, 250 VAC Main Fuse
GDCP-RES| End-of-Line Resistor, 120 Ω, ½ W, 5%
GDCP-RELAY| Relay Board
GDCP-TSA| Touchscreen Assembly
GEN2-CM/CAL| Carbon Monoxide Sensor Board
GEN2-ND/CAL| Nitrogen Dioxide Sensor Board
GDCP-SD| 32 GB MicroSD Card
GDCP-BATTERY| 3 V CR2012 Battery
GDCP-RCONN| 5-Wire Remote Sensor Harness
GDCP-BARREL| Display Power Barrel Connector
GDCP-FILTER| AC Input Line Filter
Model Prefix| Part Number| Part Description
---|---|---

TRNS2

Appendix

Control Board Layout

$BRASCH-GSE2--FG05-Generation -2-Standalone -Detectors-fig- $1$$

Acceptable Measurements

When taking measurements, use TP3 – COM as the reference unless otherwise specified. Voltage measurements must be taken with power ON. Resistance measurements must be taken with power OFF.

TP2: 5 VDC / > 0.5 kΩ
18-24 VAC1: > 18 VAC and < 27 VAC / > 100 kΩ
18-24 VAC2: > 18 VAC and < 27 VAC / > 100 kΩ
+COMM (Brown): > 100 kΩ (~same as below)
-COMM (Blue): > 100 kΩ (~same as above)
+COMM to -COMM: > 400 kΩ without termination resistor / 120 Ω with termination resistor

Sensor Board Layout $BRASCH-GSE2--FG05-Generation -2-Standalone -Detectors-fig- $2$$

Acceptable Measurements

When taking measurements, use TP3 – COM as the reference unless otherwise specified.
Voltage measurements must be taken with power ON. Resistance measurements must be taken with power OFF.

TP6: -15 VDC / > 2 kΩ
TP2: 15 VDC / > 2 kΩ
TP4: ~5 VDC / > 0.5 kΩ
TP7: ~5.0 VDC at 0 PPM to ~2.5 VDC at 100 PPM CO / 5.0 PPM NO2
TP8: 0.858 VDC for CO / 0.270 VDC for NO2
+COMM (Brown): > 100 kΩ (~same as below)
-COMM (Blue): > 100 kΩ (~same as above)
+COMM to -COMM: > 400 kΩ without termination resistor / 120 Ω with termination resistor Fuses: < 10 Ω

Interface Board Layout $BRASCH-GSE2--FG05-Generation -2-Standalone -Detectors-fig- $3$$

Acceptable Measurements

Voltage measurements must be taken with power ON. Resistance measurements must be taken with power OFF.

18-24 VAC1: > 18 VAC and < 27 VAC / > 1 MΩ
18-24 VAC2: > 18 VAC and < 27 VAC / > 1 MΩ
Fuses: < 10 Ω
Relays: Open / Closed = OL / 0 Ω

Relay Board Layout $BRASCH-GSE2--FG05-Generation -2-Standalone -Detectors- fig- $4$$

Acceptable Measurements

When taking measurements, use TP4 – GND as the reference unless otherwise specified. Voltage measurements must be taken with power ON. Resistance measurements must be taken with power OFF.

TP1: 33 VDC / > 100 kΩ
TP2: 5 VDC / > 1 kΩ
TP3: 5 VDC / > 1 kΩ
+COMM (Brown): > 100 kΩ (~same as below)
-COMM (Blue): > 100 kΩ (~same as above)
+COMM to -COMM: > 400 kΩ without termination resistor / 120 Ω with termination resistor
Fuses: < 10 Ω
Relays: Open / Closed = OL / 0 Ω

Addressing

Sensor Board

Each sensor board has a 7-position DIP switch (SW1) used to set the device address. Available addresses are 1 through 128. The address is the value of the DIP switches plus one. Brasch sensor boards are programmed and configured at the factory so that it should not be necessary to alter addresses in the field. Each unit will indicate the address assigned at the factory on its front cover label. However, these addresses can be modified by using the DIP switch on the right side of the circuit board. The address is assigned using a binary counting system where digit 0 is towards the top of the board and 1 is towards the bottom. Refer to figure 5 below for details

$BRASCH-GSE2--FG05-Generation -2-Standalone -Detectors-fig- $5$$

For a complete list of switch positions and addresses, see figure 6 on the following

Sensor Address| Switch Position| Sensor Address| Switch Position| Sensor Address| Switch Position| Sensor Address| Switch Position
---|---|---|---|---|---|---|---
1| 0000000| 33| 0100000| 65| 1000000| 97| 1100000
2| 0000001| 34| 0100001| 66| 1000001| 98| 1100001
3| 0000010| 35| 0100010| 67| 1000010| 99| 1100010
4| 0000011| 36| 0100011| 68| 1000011| 100| 1100011
5| 0000100| 37| 0100100| 69| 1000100| 101| 1100100
6| 0000101| 38| 0100101| 70| 1000101| 102| 1100101
7| 0000110| 39| 0100110| 71| 1000110| 103| 1100110
8| 0000111| 40| 0100111| 72| 1000111| 104| 1100111
9| 0001000| 41| 0101000| 73| 1001000| 105| 1101000
10| 0001001| 42| 0101001| 74| 1001001| 106| 1101001
11| 0001010| 43| 0101010| 75| 1001010| 107| 1101010
12| 0001011| 44| 0101011| 76| 1001011| 108| 1101011
13| 0001100| 45| 0101100| 77| 1001100| 109| 1101100
14| 0001101| 46| 0101101| 78| 1001101| 110| 1101101
15| 0001110| 47| 0101110| 79| 1001110| 111| 1101110
16| 0001111| 48| 0101111| 80| 1001111| 112| 1101111
17| 0010000| 49| 0110000| 81| 1010000| 113| 1110000
18| 0010001| 50| 0110001| 82| 1010001| 114| 1110001
19| 0010010| 51| 0110010| 83| 1010010| 115| 1110010
20| 0010011| 52| 0110011| 84| 1010011| 116| 1110011
21| 0010100| 53| 0110100| 85| 1010100| 117| 1110100
22| 0010101| 54| 0110101| 86| 1010101| 118| 1110101
23| 0010110| 55| 0110110| 87| 1010110| 119| 1110110
24| 0010111| 56| 0110111| 88| 1010111| 120| 1110111
25| 0011000| 57| 0111000| 89| 1011000| 121| 1111000
26| 0011001| 58| 0111001| 90| 1011001| 122| 1111001
27| 0011010| 59| 0111010| 91| 1011010| 123| 1111010
28| 0011011| 60| 0111011| 92| 1011011| 124| 1111011
29| 0011100| 61| 0111100| 93| 1011100| 125| 1111100
30| 0011101| 62| 0111101| 94| 1011101| 126| 1111101
31| 0011110| 63| 0111110| 95| 1011110| 127| 1111110
32| 0011111| 64| 0111111| 96| 1011111| 128| 1111111

Relay Board

Each relay board has a 4-position DIP switch (SW1) used to set the device address. Available addresses are 1 through 8. The address is the value of the DIP switches plus one. Brasch relay boards are programmed and configured at the factory so that it should not be necessary to alter addresses in the field. Each unit will indicate the address assigned at the factory on the label. However, these addresses can be modified by using the DIP switch near the middle of the circuit board. The address is assigned using a binary counting system where digit 0 is towards the right of the board and 1 is towards the left. Figure 7 below shows addressing for all 8 relay boards.

$BRASCH-GSE2--FG05-Generation -2-Standalone -Detectors-fig- $6$$

Troubleshooting Flowchart

$BRASCH-GSE2--FG05-Generation -2-Standalone -Detectors-fig- $7$$ $BRASCH-GSE2-- FG05-Generation -2-Standalone -Detectors-fig- $8$$

Acceptable Measurements Reference

$BRASCH-GSE2--FG05-Generation -2-Standalone -Detectors-fig- $9$$ $BRASCH-GSE2--FG05-Generation -2-Standalone -Detectors-fig- $10$$

Limited Warranty

Warranty Statement

Brasch Environmental Technologies, LLC warrants gas transmitters, gas detectors, control panels, and accessories for a period of two years from the date of shipment against defects in material or workmanship. Should any evidence of defects in material or workmanship occur during the warranty period, Brasch Environmental Technologies will repair or replace the affected product, at its own discretion, without charge. The company shall not be held responsible for any charges incurred with removal or replacement of allegedly defective equipment, nor for incidental or consequential damages. If any equipment has not been installed per Brasch instructions, this warranty is void. The cost to repair, replace, or service any component is not the responsibility of Brasch. Any replacement parts or service necessary must be paid in full prior to shipment or performance.

Service and Repair Procedures

Our goal at Brasch Environmental Technologies is to produce products that constantly exceed the requirements and expectations of our customers. One of the ways of meeting that goal is to produce products that never fail or require service. However, when we are notified of a problem with one of our products, it is our intention to address the problem as quickly and efficiently as possible. Many problems that appear at first to be associated with the product can be solved without returning the product. If you experience a problem and would like to discuss it with a factory service technician, you may call the number listed on the product label. You will be transferred to a technician specially trained to service that product. This technician will help you determine the most efficient way of solving the problem. If service or repair of your Brasch product becomes necessary, an authorization request for returning the product to the Brasch factory must be obtained from our sales office. If you are an end user, please contact your Brasch distributor to initiate this request. The distributor, after obtaining a description of the problem, will contact the factory and request a Return Goods Tag (RGT) number. This number must be placed in a conspicuous location on the outside of the shipping package. Without this RGT number, Brasch will not accept the shipment. A brief description of the reason for returning the product should be included in the package. Without this description, repair may take longer than necessary. You may, at the time you request service, request an estimate on the time it will take for repair. The Brasch representative will give you an estimate based upon the information you provide. Although Brasch Environmental Technologies, LLC will repair and return your product in as short a time as possible, Brasch cannot be held responsible for meeting repair estimates.

140 Long Road, Suite 101 Chesterfield, Missouri 63005