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4  

Troubleshooting  

This chapter describes corrective measures you can take should you encounter a problem 
when using a Differential Pressure Monitor (DPM). 

You are not required to do any monitor troubleshooting. You may wish to contact your local 
Siemens Building Technologies representative if a problem occurs or if you have any 
questions about the DPM. 

NOTE: 

When troubleshooting, record what the problem is and what actions were 
performed immediately before the problem occurred. Being able to describe the 
problem in detail is important, should you need assistance from your local 
Siemens Building Technologies representative. 

Basic Service Information 

Always

 remove power to the monitor when installing or replacing it. Since the monitor does 

not have a power switch, the recommended method of removing power to a locally powered 
monitor is to turn OFF the power to the 24 Vac transformer. The recommended method of 
removing power to a monitor on a power cable (even to service a single monitor) is to turn 
OFF the power at the transformer.

  

NOTE: 

When removing power to a monitor to perform maintenance or service, make sure 
that the person in charge of the facility is aware of this and that appropriate steps 
are taken to keep the building in control. 

Never

 remove the cover from the monitor. There are no serviceable parts inside. If a problem 

is found with a monitor, contact your local Siemens Building Technologies representative for 
replacement. An anti-static wrist strap is recommended when installing or replacing monitors. 

Preventive Maintenance 

Most DPM components are designed so that, under normal circumstances, they do not 
require preventive maintenance. However, devices that are exposed to dusty or dirty 
environments may require periodic cleaning to function properly. To ensure optimum system 
performance, we recommend that you discuss the operating requirements of your application 
with your Siemens Building Technologies representative to determine the best Technical 
Support Program for your needs. 

Siemens Building Technologies, Inc. 

 

19 

Содержание 125-2134

Страница 1: ...Differential Pressure Monitor Owner s Manual 125 2134 Rev DA October 2006 ...

Страница 2: ......

Страница 3: ...mercial environment Operation of this equipment in a residential area is likely to cause interference in which case users at their own expense will be required to take whatever measures may be required to correct the interference SERVICE STATEMENT Control devices are combined to make a system Each control device is mechanical in nature and all mechanical components must be regularly serviced to op...

Страница 4: ......

Страница 5: ...s 3 Remote Pressure Transmitter 4 Components 4 Applications 7 Basic Operation 7 Pressurization Modes 7 Setting Pressurization Mode 8 Pressurization Switchover 8 Pressure Alarms 8 Protective Isolation Positive Pressurization Mode Application 701 and 702 9 Infectious Isolation Negative Pressurization Mode Application 703 and 704 9 Door Alarm 10 Sensor Failure Alarm 10 Alarm Sequence 10 DPM Inputs an...

Страница 6: ...edure if DOOR SW MODE is set to NOPEN 24 Procedure if DOOR SW MODE is set to NCLOSE 24 CV Controller Pressure Mode Output Check 25 Equipment required 25 DPM without a Pressure Mode Key Switch 25 Procedure if DO MODE is set to NOPEN 25 Procedure if DO MODE is set to NCLOSE 26 DPM with a Pressure Mode Key Switch 26 Procedure if DO MODE is set to NOPEN 26 Procedure if DO MODE is set to NCLOSE 27 RPC ...

Страница 7: ...Differential Pressure Monitor Owner s Manual ERROR STATUS Messages 34 Clearing an Error Condition 34 Glossary 35 Index 41 Siemens Building Technologies Inc III ...

Страница 8: ...es the components of the Differential Pressure Monitor DPM and Remote Pressure Transmitter RPT Chapter 2 Applications describes the control applications available in the DPM Chapter 3 Point Database defines the point database descriptors and includes addresses and applications Chapter 4 Troubleshooting describes corrective measures you can take should you encounter a problem when using the DPM For...

Страница 9: ...cur to the user if a procedure is not performed as specified CAUTION Indicates that equipment damage or loss of data may occur if the user does not follow a procedure as specified Datamate Software Datamate is a customer software tool for all controller communications There are two versions Datamate Base and Datamate Advanced Datamate Base works on an IBM compatible Personal Computer PC or a Handh...

Страница 10: ...ive Where To Send Comments Your feedback is important to us If you have comments about this manual please submit them to SBT_technical editor us sbt siemens com These manuals along with information about other Siemens products services and technical training classes can be obtained from your local Siemens Building Technologies representative VI Siemens Building Technologies Inc ...

Страница 11: ...ditions Figure 1 Normal Alarm Horn Silence No Isolation Neutral Infectious Isolation Negative Pressure SWITCH OVERRIDE DOOR OPEN HIGH PRESSURE LOW PRESSURE GENERAL FAILURE ANTEROOM NEGATIVE ISOLATION PROTECTIVE ISOLATION INFECTIOUS ISOLATION NEGATIVE PRESSURE POSITIVE PRESSURE INCHES OF H20 PRESSURE MODE KEY SWITCH OPTIONAL SEN0175R3 PORTABLE OPERATOR S TERMINAL PORT NORMAL LED GREEN ALARM LED RED...

Страница 12: ...essure Transmitter for use with the Differential Pressure Monitor 547 003 Calibration tool for Remote Pressure Transmitter 547 004 Hardware Inputs Digital Remote pressure transmitter 2 for App 702 and 704 patient room and anteroom Door switch optional Hardware Outputs Analog 4 20 mA pressure signal 2 value resistive signal to identify pressurization mode to Room Pressurization Controller Digital A...

Страница 13: ... space is open if it is being monitored GENERAL FAILURE RPT has lost power or the DPM is not receiving the pressure signal from the RPT SWITCH OVERRIDE database points that determine pressurization mode have been set from a field panel This overrides the pressure mode key switch position rendering it ineffective ANTEROOM LCD is displaying the anteroom pressure in response to pressing the Horn Sile...

Страница 14: ...e of the anteroom Pressing the Horn Silence button for 5 seconds displays the ANTEROOM descriptor and the anteroom differential pressure on the LCD Pressure Mode Key Switch Optional The Pressure Mode Key Switch optional allows the operator to locally select the pressure mode Remote Pressure Transmitter The Remote Pressure Transmitter RPT is a Siemens Building Technologies Inc Laboratory Control pr...

Страница 15: ...tter Circuit Board The printed circuit board of the RPT Figure 3 is the pressure signal generating area The circuit board is not visible once the RPT is installed The following components are hidden once the RPT is installed 24 Vac wire receptacle Pressure signal wire receptacle Siemens Building Technologies Inc 5 ...

Страница 16: ...ting range 24 Vac 50 60 Hz Power consumption 1 4 VA Class 2 at 24 Vac Pressure Signal Output Definition and Specification The pressure signal output is a digital pulse signal that represents the measured pressure difference across the sensor Operating Range 0 5 volt rectangular wave 0 10 KHz Recommended Wire 2 Conductor 18 AWG Shielded Cable Recommended max wire length 500 ft 152 4 m 6 Siemens Bui...

Страница 17: ...ntial pressure between each room and its adjacent space Pressurization Modes The DPM has three pressurization modes the active mode is displayed in the DPM s LCD Protective Isolation Positive Pressurization The DPM expects to detect air leaving the patient room This is achieved by supplying more air to the room than is being exhausted so that contagious airborne pathogens are prevented from enteri...

Страница 18: ... method overrides the Pressure Mode Key Switch if present and renders the switch ineffective until the points are released by an operator The LCD will display the status message SWITCH OVERRIDE when a Pressure Mode Key Switch is present The SWITCH OVERRIDE message will not appear with the keyless version of the DPM Pressurization Switchover Whenever the pressurization mode is changed pressurizatio...

Страница 19: ...ger than the time set in the alarm delay the low pressure alarm will turn on and the DPM s LCD displays LOW PRESSURE and ANTEROOM The alarm clears when the differential pressure rises above the low limit and the DPM s LCD no longer displays LOW PRESSURE and ANTEROOM Infectious Isolation Negative Pressurization Mode Application 703 and 704 NOTE It is normal for the room pressure reading to briefly ...

Страница 20: ...nce When the DPM detects the alarm conditions described in Pressure Alarms or Sensor Failure Alarm ALARM STATUS Point 26 changes from NORMAL to ALARM and Normal LED green turns OFF Alarm LED red turns ON and flashes If it has not been disabled the horn sounds To silence the horn push the Horn Silence button on the front cover of the DPM The horn will not sound again until all alarm conditions have...

Страница 21: ...ails including guidelines for developing a calibration schedule contact your local Siemens Building Technologies field office Application 790 Slave Mode Application 790 is the slave mode application for the DPM Slave Mode is the state of the DPM when it is shipped from the factory In Slave Mode the DPM displays OFF and the Red and Green LEDs are OFF the Horn Silence button and Pressure Mode Key Sw...

Страница 22: ...OR POSN Point 32 changes from OPEN to CLOSED Alarm LED Alarm will normally be OFF If desired this point can be turned on or off from the field panel Normal LED Normal will normally be OFF If desired this point can be turned on or off from the field panel Horn Horn will normally be OFF If desired this point can be turned on or off from the field panel Loop Signal 4 20 mA The loop signal for zero pr...

Страница 23: ...for DIFF PRES2 Point 31 When the selected mode of pressurization is positive DIFF PRES2 must remain above this limit to prevent an alarm Valid entry range 0 001 to 0 200 inches of H20 0 249 to 49 8 Pascals ACTIVE NTRAL 10 701 702 703 704 Determines the operating mode for pressurization ACTIVE mode is either positive or negative pressure POS NEG NTRAL mode is neutral pressure NEG HI LMT1 11 701 702...

Страница 24: ...ergized during normal conditions and de energized during alarm conditions DOOR SWITCH 28 701 702 703 704 An operator defined point If a door switch is present the point should be set to YES If a door switch is not present the point should be set to NO Valid entry YES or NO DIFF PRES1 30 701 702 703 704 Indicates the differential pressure of the occupied room DIFF PRES2 31 702 704 Indicates the dif...

Страница 25: ... 8 to 49 8 Pascals used to represent the pressure for DIFF PRES1 Point 30 ALARM OUT 50 701 702 703 704 790 Digital output used to turn on and off the alarm output MAX1 POS 51 701 702 703 704 Represents the field calibration differential pressure as read from DP1 RAW Point 68 when the Remote Pressure Transmitter calibrator is set to the MAXimum differential pressure 0 170 in of water 42 34 Pascals ...

Страница 26: ... MIN2 POS 73 702 704 Represents the field calibration differential pressure as read from DP2 RAW Point 88 when the Remote Pressure Transmitter calibrator is set to the MINimum differential pressure 0 005 in of water 1 24 Pascals for positive pressurization ZERO 2 74 702 704 Represents the field calibration differential pressure as read from DP2 RAW Point 88 when tape is applied over the Remote Pre...

Страница 27: ...portion of the current differential pressure with a portion of the previous differential pressure The value of this point is a percentage of the current differential pressure it will never drop below 20 DISPLAY WT2 94 702 704 The factor used to filter out large changes in the value of DIFF PRES2 Point 31 that is displayed on the LCD This value is used to average a portion of the current differenti...

Страница 28: ...Differential Pressure Monitor Owner s Manual 18 Siemens Building Technologies Inc ...

Страница 29: ...g power to a monitor on a power cable even to service a single monitor is to turn OFF the power at the transformer NOTE When removing power to a monitor to perform maintenance or service make sure that the person in charge of the facility is aware of this and that appropriate steps are taken to keep the building in control Never remove the cover from the monitor There are no serviceable parts insi...

Страница 30: ...ork FLN make sure that the wiring is properly terminated at both the field panel and the monitor s FLN trunk terminal blocks Figure 4 The wires should not be shorted or loosely connected Maintain proper FLN trunk polarity to to Verify that the shields are properly terminated NOTE If the FLN Trunk wiring is reversed the monitor s RX LED will remain steadily illuminated It is normal for the RX LED t...

Страница 31: ...ort If you are unable to establish communication with the monitor contact your local Siemens Building Technologies representative 2 Turn the meter on and set it to monitor resistance ohms Ω 3 Select the DP MONITOR report from the Reports Menu 4 Scroll so that the display shows RELAY MODE Point 27 ALARM STATUS Point 26 and ALARM OUT Point 50 SEN0206R1 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 External A...

Страница 32: ... change in value contact your local Siemens Building Technologies representative 5 Release ALARM STATUS Procedure if RELAY MODE is set to NCLOSE 1 Set RELAY MODE to NCLOSE 2 Connect the meter to pins 1 and 2 Figure 5 3 Set ALARM STATUS to NORMAL ALARM OUT should display OFF and the meter should indicate a short circuit If either ALARM OUT or the meter does not indicate a change in value contact yo...

Страница 33: ...nds or equivalent Portable Operator s Terminal POT and cable 1 Plug the POT into the communication port on the monitor 2 Select the Start up report from the Reports Menu 3 Scroll so that the display shows DOOR SWITCH Point 28 DOOR SW MODE Point 34 and DOOR POSN Point 32 SEN0205R1 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Door Switch Figure 4 1 Figure 6 Door Switch Input Point Siemens Building Technolog...

Страница 34: ...DOOR POSN does not toggle OPEN and CLOSED contact your local Siemens Building Technologies representative Procedure if DOOR SW MODE is set to NCLOSE 1 Verify that DOOR SWITCH YES 2 Verify that DOOR SW MODE NCLOSE 3 Connect the jumper wire between monitor screw terminals 3 and 4 for the DOOR POSN point See Figure 4 1 for location of the screw terminals Verify that DOOR POSN is CLOSED indicating a c...

Страница 35: ...orts Menu 4 Scroll so that the display shows POS NEG Point 25 ACTIVE NTRAL Point 10 and DO MODE Point 33 Procedure if DO MODE is set to NOPEN 1 Set POS NEG to POS ACTIVE NTRAL to NTRAL and DO MODE to NOPEN 2 Connect the meter to pins 9 and 10 See Figure 7 The meter should indicate an open circuit If the meter does not change in value contact your local Siemens Building Technologies representative ...

Страница 36: ...nitor contact your local Siemens Building Technologies representative 2 Select the Start Up report from the Reports Menu 3 Scroll so that the display shows POS NEG Point 25 ACTIVE NTRAL Point 10 and DO MODE Point 33 Procedure if DO MODE is set to NOPEN 1 Release the points POS NEG and ACTIVE NTRAL 2 Set DO MODE to NOPEN 3 Connect the meter to pins 9 and 10 Figure 7 4 Turn the key to the Infectious...

Страница 37: ...ologies representative 5 Turn the key to the Protective Isolation Positive Pressure position The meter should indicate an open circuit If the meter does not change in value contact your local Siemens Building Technologies representative 6 Turn the key to the No Isolation Neutral position The meter should indicate a closed circuit If the meter does not change in value contact your local Siemens Bui...

Страница 38: ...th a Pressure Mode Key Switch 1 Release the points POS NEG and ACTIVE NTRAL 2 Connect the meter to pins 11 and 12 Figure 8 3 Turn the key to the Infectious Isolation Negative Pressure position The meter should indicate a value of 100 kΩ 10 kΩ If the value differs more than 10 kΩ contact your local Siemens Building Technologies representative 4 Turn the key to the Protective Isolation Positive Pres...

Страница 39: ...Chapter 4 Troubleshooting SEN0208R1 PIN 1 2 3 4 5 6 7 8 9 10 11 12 13 14 RPC Pressure Mode Figure 8 RPC Pressure Mode Point Siemens Building Technologies Inc 29 ...

Страница 40: ...s Building Technologies representative 2 Select the HW POINTS report from the Reports Menu 3 Scroll so that the display shows LOOP SIGNAL Point 49 4 Set LOOP SIGNAL to 12 mA 5 Turn the meter on and set it to monitor milliamps mA Remove the wires from pins 13 14 and place one end of the resistor in pin 14 6 Connect the meter to pins 4 and resistor Figure 9 The meter should indicate a value of 12 mA...

Страница 41: ...E is displayed on the LCD or DP2 FAIL Point 17 reads ON at the POT and GENERAL FAILURE is displayed on the LCD 1 Check the wire connections from the RPT to the monitor 2 Check that the incoming 24 Vac power to the sensor is properly connected 3 Contact your local Siemens Building Technologies representative B The wire connections from the RPT sensor and the monitor are correct but the monitor is d...

Страница 42: ...ng Contact your local Siemens Building Technologies representative if sensor relocation is necessary 2 Toggle SIG2 PHASE Point 87 from LO to HI or from HI to LO depending on its current setting 3 Contact your local Siemens Building Technologies representative E Whenever the room is changed switched over to monitor a new pressurization isolation mode the monitor goes into either high pressure or lo...

Страница 43: ...f DOOR DELAY Point 22 Verify that the time entered allows a person to pass through the doorway and the door to fully close 2 Contact your local Siemens Building Technologies representative I The monitored room is maintaining pressure but the monitor keeps going in and out of alarm 1 Check the pressure limit points for the room These values may need to be changed 2 Check the value for ALARM DELAY P...

Страница 44: ... operating properly 16 The monitor s Electrically Erasable Programmable Read Only Memory EEPROM has failed a write test Initialize the controller to correct this error condition See Clearing an Error Condition for the procedure Clearing an Error Condition To clear an error condition initialize the monitor by pressing F2 on the POT If any of the error conditions listed in Table 2 reappears in the P...

Страница 45: ...g Technologies representative ACPH Air Changes Per Hour algorithm Mathematical formula used to calculate an output value using varying inputs anteroom Small room leading from a corridor into an isolation room This room can act as an airlock preventing the escape of contaminants from the isolation room into the corridor AO Analog Output A physical point which generates a continuous variable signal ...

Страница 46: ...fferential Pressure Monitor English Units Foot pound second system of units for weights and measurements equipment controller FLN device which provides additional point capacity to a field panel or provides individual room or mechanical equipment control The Room Pressurization Controller and Constant Volume Controller are equipment controllers field panel Device containing a microprocessor for ce...

Страница 47: ... engineering units Slope and intercept constants are determined by the type and range of field input output represented by the physical or virtual point k Kilo Symbol for 1000 kilo in physical quantity FLN Field Level Network LCD Liquid Crystal Display LED Light Emitting Diode mA Milliampere HMI Human Machine Interface Device and an interface program which allows the operator to communicate with a...

Страница 48: ...e address and associated physical units Portable Operator s Terminal DOS based laptop computer used along with the Controller Interface Software to monitor and communicate with the Differential Pressure Monitor TECs and field panels protective isolation Term used in Healthcare facilities to identify an isolation room that is positively pressurized to prevent any airborne contaminants from entering...

Страница 49: ...ndent DDC control to a space TEC Terminal Equipment Controller Terminal Equipment Controller Siemens Building Technologies product family of equipment controllers Room Pressurization Controller and Constant Volume Controller for example that house the applications software used to control terminal units such as heat pumps VAV terminal boxes fan coil units unit ventilators etc trunk Communication l...

Страница 50: ...Differential Pressure Monitor Owner s Manual virtual points Points which the system uses to store information not connected to a physical device 40 Siemens Building Technologies Inc ...

Страница 51: ...E Application 704 See Dual Sensor Operation Laboratory Application EEPROM write failure 34 Application 790 See Slave Mode F B features safety 20 button action during Slave Mode 11 FLN trunk wiring 20 buttons functions 4 C G calibration GENERAL FAILURE 3 Dual Sensor Operation Laboratory Application 11 H components HIGH PRESSURE 3 9 DPM 3 Horn Silence button RPT 4 function 4 D I Datamate Software V ...

Страница 52: ... key switch 8 Differential Pressure Monitor 13 Single Sensor Operation Healthcare Application POSITIVE PRESSURE 3 pressurization mode 7 power failure result of DPM 20 Slave Mode pressure alarms 8 button action 11 infectious isolation 9 definition 11 protective isolation 9 door input 12 pressure mode key switch using relay outputs 11 setting pressurization mode 8 SWITCH OVERRIDE 3 8 Pressure Mode K...

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