Technical data

40
STRATA2
2. Unit prevented from operating. Water temperature too high, measured by the
flow sensor.
When the water temperature drops by more than 20ºC the unit will start to operate.
3. Unit prevented from operating. Anti-cycling time.
When the anti-cycling time (3 minutes has expired, the unit will automatically fire up again).
5. Unit prevented from operating. Combustion fan speed too high.
The combustion fan has been switched off, but a speed indication is still detected. The Strata 1-120
will be blocked and after 3 minutes, a locking (flashing) fault will be shown with the same text. If,
however, the situation is resolved within 3 minutes, the unit will return to normal operating mode.
7. Unit prevented from operating. Combustion fan speed too low.
If this code appears, the Strata 1-120 will be blocked. If the speed has not returned to the normal
value within 3 minutes, locking will take place. If the situation is resolved within this period, the unit
will resume normal operation.
8. Unit prevented from operating. Flame simulation.
Although the burner is not operative, a possible flame is being detected. If this code is shown, the
burner control will be blocked. After five seconds, the burner control will be locked.
9. Unit prevented from operating. Limit temperature flue gases.
If the flue gas temperature drops by more than 20ºC, the unit will automatically fire up again, if this is
not the case, the unit will lock out.
da Communication between burner control and RVA 27 interrupted (PPS).
The burner in question will not operate until the circuit is re-established - check all PPS wiring
connections for security. Apply contact cleaner to all PPS connections. Check voltage on PPS
connections should be 10-15vdc.
db Communication between burner control and the ignition control
board interrupted.
The burner in question will not operate until the circuit is re-established.
9.1.2 fault indicator (flashing)
The unit automatically makes several attempts to resolve any malfunctions in the system, if these
attempts prove unsuccessful the unit is switched off. The fault is indicated by means of a flashing code.
The type of fault is indicated by a two digit code, the first digit shows when the fault occurs, the second
digit shows the nature of the fault. This means that any combination of digits may show, but some
combinations will never occur.
Refer to the tables below for fault types:
9.1.1 operation indicator (contd)
1. System Test
2. Stand by
3. Pre Purge
4. Pre Ignition
5. Ignition
6. Operation
7. Post Purge
1. Maximum thermostat open, or water level in syphon too high
2. Flue gas thermostat open
3. Resistance in the flue gas tube is too high
4. Unused figure
5. Combustion fan speed too low
6. Combustion fan speed too high
7. No flame signal
Table 13
First Digit
Table 14
Second Digit
For example, if the flashing fault code 6 7 appears, this means that the flame has disappeared several
times during operation.