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 2000 - 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
36