Troubleshooting; Error Messages - Tekmar Mixing Control 354 Data Brochure

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Table of Contents

Power light on — Test light on — Closing light on

The control turns off the boiler and pump and turns on the close relay for the time span set on

the Motor Speed dial.

If the Test Button is pushed once during the time the valve is driving closed, the The "Test"

light will flash, and the control will be held in a pause mode for 5 minutes, after which time it

will automatically exit the test routine and cycle into normal operating mode. During the 5

minute pause, the valve will continue to drive to the fully closed position.

Pushing the Test button during the 5 minute pause will allow the control to resume the test

routine at the next step, which is back to normal operating mode.

Power light on — Test light off

The control has exited the test routine, entered operating mode and will function according to the sequence of operation described

on pages 3 and 4. One or more of the indicator lights may be on. Refer to page 3 and 4 for a description of the possible indicator

light combinations under normal operating conditions.

Step Eight

As in any troubleshooting procedure, it is important to isolate a problem as much as possible before proceeding. The Error

Messages and Test button greatly simplify troubleshooting of the type 354. When the control is flashing an Error Message,

identify the fault from the look-up table on the bottom of this page and then follow standard testing procedures to confirm the

problem. If you suspect a wiring fault, return to steps four and five and carefully check all external wiring and wiring connections.

Notes:

• If the Outdoor Sensor develops either a short circuit or an open circuit, the control is programmed to calculate the outdoor

temperature at -8°F (-22°C), and control the supply temperature accordingly.

• If there is an Outdoor Sensor failure, the control will only allow the valve to operate as high as the supply maximum setting.

• If the Supply Sensor develops either a short circuit or an open circuit, the control is programmed to fully close the mixing

valve to help prevent overheating.

After any repair has been completed, press the test button to confirm that correct operation has been restored.

Step Nine

• Install the wiring cover over the wiring chamber and secure it to the base with the two screws provided. Place the front cover

on the control to cover the setting dials and snap it into place. Install a lock if security is required.

• Place this brochure, and all other brochures relating to the installation, in the protective plastic bag supplied with the control.

Place the bag in a conspicuous location near the control for future reference.

• It is important to explain the operation and maintainance of this control and of the system to the end user and anyone else who

may be operating the system.

Error Messages

Whenever a fault is detected in any of the sensors, the indicator lights will flash in specific ways,

indicating the location of the problem. The following look-up table describes each error

condition and shows the flashing light sequence that results. After repairing the problem,

press the test button to cycle the control through the test routine. This will confirm that the

fault has been repaired and that correct control action has been restored. For detailed

Sensor testing instructions see Data Brochure D 001.

Power

Heat Demand

WWSD

Unoccupied

Indoor

Min. Return

Sensor

Max. Supply

short

circuit

Pump

Boiler

Closing

Opening