T28499 replacement unit board GIF-61

qualification

qualified personnel

Material

Required material

• Torx screwdriver size 20

procedure

Cool down and turn off the unit

• On the basic screen, tap the function button ().
  → The unit cools down until the temperature is lower than the cooling temperature. The unit then switches off.

• Switch off the main switch (QS 1), pull out the mains-connector.

Open front

• Open the front door and fold the front completely down by loosening the two Torx screws.

Replace unit board

• Remove all connectors on the GIF-61 (A 4) unit board.
• Push the mounting straps (2) of the GIF-61 (A 4) unit board outwards.
  → The circuit board can now be lifted out.
• Insert the new GIF-61 (A 4) unit board into the appropriate recesses.
  → Check whether the mounting straps (2) are locked in place.
• Reconnect all plug connections to the GIF-61 (A 4) unit board.
  → Check whether all connectors are correctly attached.

Close front

• Fold up the front and secure 2x Torx screws.

Switch on the unit

• Connect the mains-connector and switch on the main switch (QS 1).
  → If necessary, The unit automatically software-update.

NOTE!

If the configuration is incomplete, the corresponding error message appears on the screen. The error message can be ignored because a reset complete is then carried out.

Reset data

• Tap the profile button () on the basic screen.
• Select [User Profile].
• Set the parameter to “Maintenance.”
• Select [Service] > [Configuration] > [Reset Complete].
  → Access is via the code "1.2. “
• Tap the reset symbol () to reset all data.

Configuring a unit

• Select [Service] > [Configuration].
  → Access is via the code "1.2. “
• Reconfigure the unit. When configuration, follow the information on the unit's nameplate. The following parameter settings are required:
  • unit number
  • year of manufacture
  • Temperature
  • hydraulic system
  • unit housing size
  • Heating type
  • pump type
  • Cooling type
  • Mains voltage (U _N)

calibrating the unit

Calibrate pressure measurement

• Make sure the unit is depressurised.
  → The unit's pressure gauge must read 0.0 (±0.3) bar.
• Remove the hydraulic connections on the Main line and Return line lines.
  → The unit's pressure gauge must read 0.0 (±0.3) bar.
• Select [Display] > [Actual Values] > [System Pressure] or [main Line Pressure].
  → The system pressure must display 0.0 (±0.1) bar.
  If there is a deviation of >0.1 bar, the unit's pressure sensors must be checked. In the case of larger linear errors, a general deviation (offset) from the pressure sensor must be corrected.
  → [Service] > [Calibrating] > [Pressure] > [Pressure sensor 1 Offset] (System Pressure) or [Pressure sensor 2 Offset] (main line pressure).

Control:

• Select [Display] > [Actual Values] > [System Pressure] or [main Line Pressure]
  → The system Pressure must display 0.0 (±0.1) bar. If this act not the case, Repeat The Calibrating Of The Pressure Sensor.

Calibrate Flow rate measurement

• Install the hydraulic line with shut-off valve (e.g. HB-TP180 checking facility) between the Main line and Return line connection.
• In normal operation, operate the unit at 40°C for at least 10 minutes.
• Select [Service] > [Calibrating] > [Flow Rate] > [Flow rate offset (internal)].
  → Set the parameter to 5 l/min.
• Close the shut-off valve between Main line and Return line and wait for 1 minute.
• Read the current flow rate.
• Set the parameter [Flow rate offset (internal)] using the following calculation:
  → New offset = 5 L/min — 'current flow' [flow Rate].
• Open the shut-off valve.

Control:

• In normal operation, operate the unit at 40°C for at least 10 minutes.
• Close the shut-off valve between Main line and the Return line.
  → The flow rate drops to 0 l/min and the “Flow rate zero” alarm message is delayed.
• Acknowledge acknowledge alarm and open the shut-off valve.

Check function

• Switch on the unit using the I/O button (), check the tightness and function of the unit.
• Check the device functions (regulate for the desired set value).
• Switch off the unit using the I/O button ().
  → The unit switches off and, if necessary, is cooled and depressurised.
• Switch off the main switch (QS 1).