Velleman projects K8037 Assembly instructions - Manual (Page 11)

11
LED indications in case of error:
When the CPU detects an error, LD1 (red) can provide an indication as to the nature of the problem. LD2
(yellow) will then remain lit continuously, whereas LD1 (red) will repeatedly flash a number of times:
We advise you to briefly interrupt the supply voltage and evaluate the situation. It is possible to restart the
module without interrupting the voltage: hold the operation button for at least 10 seconds (until both LEDs
are extinguished).
Flashes
LD1
Error Possible cause / solution
1
Timeout in the positive alternation of the
mains voltage
error in voltage zero-crossing circuit (T1, ...)
2
Timeout in the negative alternation of the
mains voltage
error in voltage zero-crossing circuit (T1, ...)
3 Triac triggering timeout
- Triac defective ?
- Light source defective ?
- T2 defective ?
- Load doesn't conform to specifications ?
4 Phase shift is too great
- Load behaves too inductively ?
- No load connected ?
- No load on transformer (because of defective lamp ?)
- Load not conform ?
Installation & use