26
English
ˆƖˀƘǹʼ¹Ä¹ÊŻǼ½ËƼÁ¿Ɩʾˀƽ
There is an LED on the board that displays any board
errors.
4HEERRORCODECANBEIDENTIlEDFROMTHEmASHING,%$
using the following table. In the case of more than one
error, the error with the highest priority will be displayed
until it is resolved.
)NTHECASEOFNORMALOPERATIONTHE,%$mASHESATA
frequency of ½ Hz. In the case of an error, the LED
remains of for 4 seconds, then at a frequency of 1Hz, it
mASHESANUMBEROFTIMESEQUALTOTHEERRORCODEANDTHEN
remains off again for 6 seconds. If the error code has 2
DIGITSTHEmASHINGISINTERRUPTEDFORSECONDSBETWEENTHE
lRSTANDSECONDDIGITS
%XAMPLE%RROR,%$OFFORSECONDSmASHESATA
FREQUENCYOF(Z/FFFORSECONDSmASHESATA
frequency of 1Hz. Off for 6 seconds. The cycle repeats until
the LED turns off because the problem is resolved or if an
error with higher priority occurs.
Frozen plates exchanger
If this fault code is displayed, it means that the plates
exchanger froze during cooling operation.
The only way to restart the unit is to powered OFF -->ON
the unit.
"EFOREDOINGTHISOPERATIONCONTACTTHEQUALIlEDSERVICE
4HEFULLINSTALLATIONCONlGURATIONMUSTBECHECKEDUNIT
and water loop).
Fault Code
Description
2
Safety Input
3
Frozen plates exchanger
4
Actual Refrigerant Temperature Sensor (TR)
5
Outdoor Air Sensor of GMC
6
Loss communication to NUI control
7
NUI control Room Sensor
9
Flow Switch error / Water Pump
10
EEProm Corrupt
11
User interface setting mismatch
12
4 Way valve error
13
Loss Communication to RS485 (system coniguration type 6)
14
Loss of Signal From inverter board or High Temperature Release
15
Exit water Temperature Sensor (LWT)
16
Alarm Test
17
Inverter Air Sensor (TO)
18
G-Tr inverter short circuit protection
20
Compressor position Detection Circuit error
21
Inverter Current Sensor error
22
Heat Exchanger Sensors (TE) / (TS)
23
Discharge Temperature Sensor (TD)
24
Outdoor Fan motor error
26
Other unit error
27
Compressor Lock
28
Discharge Temperature error
29
Compressor Breakdown
30
Low pressure system error
31
High pressure system error
ʾʽƙ
Type of safety device
Switch on pressure
Release
Pressure switch on water
300kPa
N.A.
Anti-Freeze Protection
Adjustable from 3 to 9 °C
software controlled
Delayed compressor start
OFF-->ON
180 s max*
Delayed compressor stop
ON-->OFF
180 s*
Start Acceleration Limit
compressor
6 accelerations/h*
* 6 acceleration/h logic has the priority
IMPORTANT: During functioning in heat pump heating
mode, the unit performs defrost cycles to eliminate any
ice that might form at low temperatures inside the
outdoor unit.
ʾʾƙ
Cleaning the coil
If necessary, proceed as follows for more careful cleaning
of the coil:
Switch the mains supply OFF.
2EMOVEUNITTOPCOVERBYLOOSENINGTHElXINGSCREWSAND
lifting the cover. Carefully clean the coil with a vacuum
cleaner from inside to outside. With the same vacuum
cleaner, remove the dust from inside the fan compartment
and the fan blades. Avoid any damage to the blades which
may cause future vibrations and noise.
Replace the unit cover and tighten the screws.
IMPORTANT: The operation must be performed by
QUALIlEDPERSONNEL
11.1 - Refrigerant charge check
This check becomes necessary after any refrigerant leak or
after replacement of the compressor.
The best method to correctly charge refrigerant is to
completely empty the refrigerant circuit using refrigerant
recovery equipment.
Then charge the exact quantity of refrigerant according to
the data shown on the unit nameplate. R-410A systems
must be charged with liquid refrigerant. Use the special
recharging equipment (normally in the market) to handle
the refrigerant correctly. The oil used for the compressor is
ESTER OIL VG74 (VG68 for size 12).
Do not use refrigerants and lubricant besides those
SPECIlED$ONOTCOMPRESSAIRTHEREMUSTBENOAIR
intake due to leakage in the refrigeration cycles).
