Operating Instructions
Table Of Contents
- Table of Contents
- How To Use This Manual
- Chapter 1—Hardware
- Chapter 2—Applications for ATEC— Base VAV
- Chapter 3—Applications for ATEC—VAV with Reheat
- Chapter Overview
- Introduction
- Application 2500: VAV Cooling Only
- Application 2501: VAV Cooling or Heating
- Application 2522: VAV with Electric Reheat or Baseboard Radiation
- Application 2523: VAV with Hot Water Reheat (only one reheat valve)
- Application 2524: VAV Series Fan Powered with One Stage of Electric Reheat
- Application 2526: VAV Parallel Fan Powered with One Stage of Electric Reheat
- Application 2473: Slave Mode
- Chapter 4—Point Database
- Chapter 5—Troubleshooting
- Glossary
- Index
Chapter 5—Troubleshooting
5-6 Siemens Building Technologies, Inc.
Automated Checkout
The ATEC has a built-in checkout procedure that can be manually initiated at any time after the
controller has been installed. The procedure tests all of the necessary I/O and ensures the
controller has the ability to operate within the set airflow range, between CLG FLOW MIN (Point
31) and CLG FLOW MAX (Point 32).
To perform the checkout procedure, set CHK OUT (Point 10) to YES. When the procedure is
completed, CHK OUT returns to NO and the results are displayed in CHK STATUS (Point 3). See
Table 5-1.
Table 5-1. Possible Failure Value and Description.
CHK STATUS
Values (Point 3)
Description
-1 Checkout procedure has not been run since last controller initialization.
0 No errors found.
1 Room temperature sensor failed.
2 Room setpoint dial failed [If STPT DIAL (Point 14) is set to YES].
4 Air velocity sensor failed.
8 Controller could not reach CLG FLOW MIN or below.
16 Controller could not reach CLG FLOW MAX or above.
NOTE: Multiple failures are added together and displayed as one value. For example, if the
room temperature sensor failed (1) and the controller could not reach CLG FLOW
MAX (16), CHK STATUS displays 17.
Failure codes indicate the following possible problems.
Room temperature sensor failed—CHK STATUS (Point 3) = 1
1. The cable for the room temperature sensor may be unplugged or loose. Check both
ends to ensure that the cable is securely seated.
2. Connect directly to the controller through the room temperature sensor connection
on the ATEC and check whether communication is possible. If so, the problem lies
in the room temperature sensor or its cable. If not, the problem is with the controller.
3. Contact your local Siemens Building Technologies representative.
Room setpoint dial failed—CHK STATUS (Point 3) = 2
1. The cable for the room temperature sensor may be unplugged or loose. Check both
ends to ensure that the cable is securely seated.
2. The controller may be incorrectly set to use a setpoint dial with a sensor that does
not have the dial. If the sensor has no dial, change STPT DIAL (Point 14) from YES
to NO.