Greenheck Microprocessor Controller (474706 IOM) TAP v1.04 J Manual de usuario descargar pdf (Pagina 28)

DDC Controller for Tempered Air Products

Display is hard to read.

Unit Controller Display: Hold

Prg

Esc

ESC and

Prg Esc

ENTER at the same time, while

pressing

Prg Esc

DOWN or

Prg Esc

UP to adjust display contrast.

Remote Display: Hold

Prg Esc

ALARM,

Prg

Esc

PRG, and

Prg

Esc

ESC at the same time, while

pressing

Prg Esc

DOWN or

Prg Esc

UP to adjust display contrast.

Remote display panel

displays “NO LINK” or

is blank.

Hold

Prg Esc

DOWN,

Prg Esc

UP and

Prg Esc

ENTER for 4 seconds. Set the display address

to 32. The display requires a standard 24 AWG six conductor phone cable

connected to the unit controller.

Red alarm button is

flashing.

Press the

Prg Esc

ALARM button to review and clear unit alarms. Enter the DATA

LOGGER menu to view previous alarms.

Controller resets itself

or is not on.

Check the supply voltage to the controller at terminals G-G0. The board requires

24VAC. Check the 24VAC transformer in the unit control center.

Menus are locked with

a password.

The factory default Manufacturer Password = 1000.

The factory default Service Password = 1000.

Temperature sensor

failure.

Check the analog input terminal block (labeled terminals B1, B2, B3, etc) for loose

wires. Disconnect temperature sensors to check sensor resistance.

Troubleshooting

NTC Temperature Sensor Chart

120

110

100

4 6 8 10 12 14 16 18 20 22 24 26 28

Temperature (ºF)

Resistance (kΩ)

1 2 ... 23 24 25 26 27 28 29 30 31 32

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Greenheck Microprocessor Controller (474706 IOM) TAP v1.04 J Manual de usuario Pagina 28

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