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31
Tempra 12 / 18
Is LED5 on?
Put main switch to on
CH Selector to
Summer “
” position
Is 230V present across
terminals X1-1 X1-2?
Check and if necessary
replace 2A fuse
YES
Is LED5 ON now?
Repair external
wiring fault
NO
NO
Replace
main board
NO
YES
Does fan run at full speed?
Go to CHART 2
NO
YES
Does CH Pump run?
If the boiler temperature
is less than 5
°
C
frost protection is activated
Disconnect
CH flowtemp sensor
Has fan speed stopped?
Check and if necessary
replace main board
NO
YES
Chek the following carefully before starting
• Gas supply is turned on, is adequate and purged
• Electricity supply is turned on
• Polarity is correct
• CH pressure is set between 1 - 1,5 bar
• CH pump spins freely
• CH system flushed correctly
• CH bypass adquate
NO
Is Relay RY101 switch on?
Check and if
necessary
replace pump
YES
NO
Check pump
wiring
connection
YES
Go to CHART 2
YES
3.5 Troubleshooting
Flow Diagram 1
Checking Power Supply-System Pressure and Anti-freeze Protection