McQuay MAC Spezifikationen PDF herunterladen (Seite 43)

Symptoms Possible Cause Troubleshooting

1 Panel gets hot - Wiring fault in 12VDC supply - Change a new panel module and turn ON the unit again

abnormally after the verification

2 The LCD no display - Wiring fault in 12VDC supply - Correct the wiring problem

(blank screen) - No power supply - Check the wiring and supply 12VDC to panel

- Voltage supply too low - Check the power source

- Module defective - Change a new panel module

3 - -' for all status -Panel cannot/ not yet - Ensure the selected unit exits in the network

(quite a long time) received the information - Ensure the wiring is correct

from chiller or FCU completely - Ensure the wiring is not defective

-Ensure the wiring has been isolated from high power cable

- That particular unit address - Select a coherent unit address on the panel (refer to

is not recognized by the panel 6.2.2)

- Module defective - Change a new module

4 ON/ OFF, COOL or - Software limitation - Ensure it is pressed (hold 1s) in [Summary Pages]

HEAT button not not in other menu.

function - Module defective - Change a new module

5 Cannot switch to - Software limitation - Ensure this mode is available in current "Model" of

HEATING mode Chiller, please refer to 6.2.4

6 Cannot switch to - Software limitation - Ensure this mode is available in current "Model" of

BOILING mode Chiller, please refer to 6.2.4

7 No "Manual Defrost" - Software limitation - Ensure current running mode is HEATING

item

8 Cannot step inside - Software limitation. Panel has - Refer to symptoms 3

[Set Parameter] not received all the information

from chiller completely

9 7 Days Programmable - Software limitation. User Control of Chiller:

Timer not function did not activate the schedule - Ensure the "Timer" in [Timer Menu] is set ENABLE

Control of Chiller:

- Ensure the 'Timer" in [Operation Menu] is set ENABLE

10 No beeping sound - Software limitation. User - Ensure "Buzzer" in [Panel Option] is set ON

when new alarm did not set ON to the alarm

occurred buzzer

11 No screen saver after - Software limitation. User did - Ensure "Screen Saver" in [Panel Option] I set ENABLE

timeout not set ENABLE to the screen

saver

12 Time always reset to - No backup battery - Replace coin cell battery

12:00am, 1st Jan 200

- Energy of the backup battery is

low

13 Panel stop operation. - Unstable power supply - Power off the panel. Take out the backup battery as well.

Whole operation - Energy of the backup battery is Replace with a new 3V coil cell battery if necessary. Put

freezing (hang) low back the backup battery into the panel and power on again

7. Problem And Troubleshooting

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