Robur G 30, Installation, Use And Maintenance Manual

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Diagnostics
Installation, use and maintenance manual – Next-G
55
8
The intervention of the temperature limit ther-
mostat ALWAYS indicates an abnormal condition.
Before resetting, it is therefore advisable to search
for the reasons that led to the unit overheating. If
frequent stops occur, contact Robur TAC.
Figure 7.1
Position of the limit thermostat reset
A Protective cap of the limit thermostat reset button
A
7.4 EMERGENCY MODE
If there is a fault on the supplied room probe, the emer-
gency mode is activated, which deactivates room temper-
ature control by the gas unit heater and activates continu-
ous operation at the lowest power level.
This condition is indicated by warning 821 (Table
8.1 p. 55).
On deactivation of the service request by the provided
control device, the burner is switched off.
If, on the other hand, the room temperature value is
communicated via Modbus and Modbus communication
fails, the gas unit heater will switch off.
7.5
PERIODS OF INACTIVITY
Should you foresee to leave the appliance inactive for a
long period of time, disconnect it from the electrical and
gas mains.
How to deactivate the appliance for long pe-
riods of time
1. Switch the appliance off (Paragraph 6.2 p. 50).
2. Only when the appliance is completely off, power
it off with the main switch/disconnector switch
(Detail GS in Figure 4.1 p. 36).
3. Close the gas valve.
How to reactivate the appliance after long pe-
riods of inactivity
Before reactivating the appliance, the operator/
maintenance technician of the system must first of
all:
„
Check whether any maintenance operations are re-
quired (contact the TAC; see Paragraph 7.2 p. 54).
„
Ensure that the flue gas exhaust duct and the air
intake are not obstructed.
After completing the above checks:
1. Open the gas valve and ensure there are no leaks;
should gas smell be noticed, close the gas valve
again, do not switch any electrical devices on and
request intervention by qualified personnel.
2. Power on with the main power supply switch (GS,
Figure 4.1 p. 36).
3. Switch on the appliance by means of the provided
control device (Paragraph 6.2 p. 50).
8 DIAGNOSTICS
8.1
BOARD CODES
Table 8.1 Operative codes
Code Description Warning (u) Error (E)
801 Limit thermostat trip NA Contact the TAC.
802 Flue gas thermostat trip Contact the TAC.
807
High heat exchanger temper-
ature Reset is automatic when the trig-
gering condition ceases.
NA
809 Flue gas temperature too low NA Contact the TAC.
812
Flame controller lockout
Reset is automatic up to 5 attempts
(in about 5 minutes).
Check gas supply.
If the code persists or in case of doubt, contact the TAC.
The reset may be done following one of procedures shown in
Paragraph 6.6.3
p. 54.
813
Flame controller communica-
tion error Reset is automatic when the trig-
gering condition ceases.
The reset may be done following one of procedures shown in
Paragraph 6.6.3
p. 54.
If the code persists, shows up again or in case of doubt, contact the
TAC.
814
Flame controller not compat-
ible
NA Contact the TAC.
NA: Not Applicable