Riello AARIA MULTI 250 P, Инструкции по установке и техническому обслуживанию

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COMMISSIONING AND MAINTENANCE
— disconnect the pressure gauge unit
— refit the valve covering plug
9
Carefully check for absence of leakages from the closing
point of the plug.
3.4 Operation signal and alarms
Model 250
Signals are displayed by means of LEDs on the unit main elec-
tronic board.
Proceed as follows to access the filters:
1 Upper panel
2 Electric panel cover
1
2
— unscrew the fastening screws
—
remove the top panel
— unscrew the fastening screws
— remove the electric panel cover
1 Main electronic board
2 Led 2
3 Led 1
1
2
3
The unit operation is signalled with LED 2.
Led 2 Description
On Indicates that the unit is supplied with electricity
Off Indicates that the unit is not supplied with electricity
After the LED switches off:
9
Wait 10 minutes before touching the device electric compo-
nents.
9
Check with a tester that the voltage between the pow-
er supply connectors of the main electronic board is lower
than 10 Vdc.
Faults are signalled by means of LED 1 blinking.
Led 1 Description
1 External unit microprocessor fault
2 Power module fault (IPM)
3 Main electronic board protection against overcurrent
4
Communication error between main board (PCb) and power
module (IPM)
5 High pressure protection
6 Wrong power supply voltage
7 Compressor lockout
8 Overheat protection for compressor discharge
9 Fan motor malfunction
10 Defrost temperature sensor failure
11 Suction probe fault
12 External air probe fault
13 Discharge temperature sensor failure
14 Compressor suction overtemperature
15 Communication error between outdoor and indoor unit
16 Lack of refrigerant
17 4-way valve malfunction
18 Deviate from the normal for the compressor
19 Power module malfunction
20 Internal unit overload
21 Internal unit anti-freeze protection
22 Outdoor unit terminal block overheat protection
23 Main electronic board overheating
24 Compressor motor overcurrent
25 Overcurrent protection for single- phase of the compressor
27 CT disconnection
28 Liquid probe circuit A fault
29 Liquid probe circuit b fault
32 Gas probe circuit b fault
33 Gas probe circuit b fault
37 Heat exchanger protection
38 Power supply modul fault
46 Wrong combination with indoor unit
In the presence of operating abnormalities, the unit is secured
and blocked.
9
Safety block can occur randomly.
9
Wait for at least 10 minutes before restarting the unit.
9
If the fault occurs again, an accurate check of the device
components is required. Contact
R
Technical Support
Service.
9
Indoor units with display signal faults with an alphanumeric
code. Consult the matching outdoor unit instruction booklet
for the installer.
Model 355 - 370 - 475 - 485
The signals will be shown through LEDs and a display on the
signal panel.