Faults; Faults Indicated On The Display - Buderus Logamatic SC40 Installation And Servicing Instructions

Faults

8
8 Faults
8.1

Faults indicated on the display

When indicating a fault, the display is back-lit in red. In addition, the type of fault is indicated by sym-
bols. The individual fault messages can be retrieved using the rotary selector. Fault messages con-
tinue to be displayed until the fault is rectified.
V In the case of sensor faults, eliminate the cause of the fault to cancel display of the fault.
V With other faults, eliminate the cause of the fault and then press the rotary selector
cel display of the fault.
Indication/Type of fault
Effect
Sensor failure S1 ... S8
Associated components
(pumps/valves) are switched
off.
Sensor short circuit S1 ... S8
Associated components
(pumps/valves) are switched
off.
"No fluid flow in solar systems"/"secondary system"
The temperature difference
between collector temperature
sensor and bottom cylinder
temperature sensor or between
heat exchanger flow tempera-
ture sensor and bottom cylinder
temperature sensor is too
great.
"Daily heating running time error"
The daily heating function has
not been carried out.
"Collector connections reversed"
Collector temperature drops
10 K (°C) within 15 seconds of
switching on.
Tab. 39 Possible faults indicated on the display
70
Possible causes
Temperature sensor not/incorrectly
connected.
Temperature sensor or sensor lead
defective.
Temperature sensor or sensor lead
defective.
Air in the system.
Pump is stalled.
Valves or shut-offs are closed.
Pipe clogged.
Target temperature not reached.
Collector connections reversed.
Logamatic SC40 - Technical specifications are subject to change without prior notice.
Remedy
Check sensor connections. Check
temperature sensors for breakages
or incorrect positioning.
Replace temperature sensor.
Check sensor lead.
Replace temperature sensor.
Check sensor lead.
Bleed the system.
Check the pump.
Check valves and isolators.
Check/flush out pipe.
Check the pump. Check the cylinder
temperature. Check supplementary
heating.
Fit flow and return pipes correctly.
to can-
OK