20
GB
• If tripped:
-
Turn off and lock out the unit.
- Correct the fault.
- Reset the circuit breaker.
Note:
The opening of circuit breaker
Q4
disconnects only the control part. In the event of maintenance / servicing, all circuits
must be disconnected by opening the main circuit breaker.
7.5 - TROUBLESHOOTING RECOMMENDATIONS
• All maintenance and servicing operations on the refrigerating circuit must be conducted in accordance with standard trade
practices and safety rules: recovery of the refrigerant, inert shielded (nitrogen) brazing, etc…
• All brazing operations must be conducted by qualified welders.
• For equipment charged with R 410 A, refer to the specific instructions in paragraph 4.1 and in the outdoor unit's manual.
• This unit is equipped with pressurised equipment, for example piping.
Use only genuine parts listed in the spare parts list for replacing defective refrigeration components.
• Pipes may only be replaced by copper tubing in compliance with standard NF EN 12735-1.
• Leak detection, in the case of pressure testing:
- Never use oxygen or dry air, as the risk of fire or explosion is present.
- Use dehydrated nitrogen or a nitrogen and refrigerant mix indicated on the manufacturer's plate.
- For units equipped with pressure gauges, the test pressure must not exceed the gauges' maximum allowable pressure
rating.
• All part replacement with other than genuine parts, all modifications of the refrigerating circuit, all replacement of refrigerant
by a fluid other than that indicated on the manufacturer's plate, all use of the unit outside the application limits defined in the
documentation, shall result in the cancellation of PED EC marking compliance which shall fall under the liability of the
individual who carried out these modifications.
• The technical information, relative to the safety requirements of the various applicable directives, is indicated on the
manufacturer's plate of the unit and mentioned on the 1
st
page of this manual.
8 - WIRING DIAGRAM
A1
Heating control PCB
A2
Indoor unit PCB
CC1
Communication and control module
E1
Water pressostat
F1
Automatic - heater safety thermostat
F2
Manual - heater safety thermostat
J1
Water flow switch
KA1
Heater fault relay
KA2
Water flow relay
KM1
R1 contactor
KM2
R2 contactor
KM3
R3 contactor
KM4
M1 contactor
M1
Water circulator pump
Q1
R1 circuit breaker
Q2
R2 circuit breaker
Q3
R3 circuit breaker
Q4
Control circuit breaker
R1
Support heating element
R2
Support heating element
R3
Support heating element
S1
Water inlet temperature sensor (system)
S2
Water outlet temperature sensor
S3
Outdoor air temperature sensor
S4
Heat pump exchanger temperature sensor (E2)
S5
Liquid line temperature sensor (E1)
S6
Water return temperature sensor (Heat pump) (TA)
TR
Indoor unit board power supply transformer
Symbols of the components
BU
Blue
BK
Black
PK
Pink
RD
Red
WT
White
Colours of the wires