Alarm And Fault Detection And Display; Detection; Signalling; Cancelling Alarms Or Faults - Blakeslee UC-19 Instrucciones Para La Instalación, Uso Y Mantenimiento

19. ALARM AND FAULT DETECTION AND DISPLAY

19.1 Detection

The following faults are managed and displayed:
• sensors: when they are in short-circuit or interrupted, or when the temperatures measured are below 41°F (5°C) or above
257°F (125°C)
• boiler overtemperature: when the boiler temperature exceeds 221°C (105°C)
• tank overtemperature: when the tank temperature exceeds 194°F (90°C)
• boiler heating failure: if the set temperature is not reached within 15min. of boiler heating element activation
• tank heating failure: if the set temperature is not reached within 1h of tank heating element activation
• water loading: if fi lling is not completed within the set time
• drain alarm: if the tank is not empty within 3 min. of drain activation
• fl owrate alarm: if the water supply fl owrate is less than 1,06 USgall/min (4 litres/minute - if enabled)
• fi lter alarm: in case of fi lter failure (if enabled).

19.2 Signalling

Faults are signalled by displaying the message
FAULT CODE TYPE OF FAULT
1 Faulty boiler sensor
2 Faulty tank sensor
3 Water load
4 Boiler heating failure
5 Tank heating failure
6 Boiler overtemperature
7 Tank overtemperature
8 Drain
9 Flowrate alarm
10 Boiler not fi lled
11 Rinse missed
Table 4

19.3 Cancelling alarms or faults

Alarms or faults can be cancelled by pressing the button
signalled by the red LED
To reactivate the machine press the button
If the fault has been repaired the machine displays the tank and boiler temperatures, otherwise the alarm message will
reappear.

19.4 Boiler overtemperature alarm

This type of alarm is activated when the boiler temperature exceeds 221°F (105°C).
At the same time also boiler cooling is activated and occurs in the following way:
• introduction of cold water, by means of the water fi ll/rinse solenoid valve, for the quantity of water delivered useful for the
rinse set in programming.
If the parameter

Flowswitch

• introduction of cold water, by means of the water fi ll/rinse solenoid valve for approx. 15 sec
• 43sec pause.
This cycle is repeated until the boiler temperature falls below 220°F (105°C).
The cooling function is not executed or is stopped if the door is opened.
USER SECTION
Er
Off .
B again.
is not enabled:
followed by the fault code (see table 4).
CURE
Replace sensor
Replace sensor
Water valve closed or water supply failure
Check sensor or heating element Call Technical Assistance
Check sensor or heating element. Call Technical Assistance
Faulty sensor/faulty control unit Call Technical Assistance
Faulty sensor/faulty control unit Call Technical Assistance
Overfl ow not removed.
Drain blocked.
Drain pump damaged
Check water supply pressure - min. 4 l/min - 1,6 US gall/min.
Water valve closed. Make sure the pressure increase pump is
not blocked. Call Technical Assistance
Water valve closed or water supply failure
Rinse pump damaged. Call Technical Assistance
B for about 3 seconds; in this way the machine goes on stand-by
USA
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