
23
FIGURE NINETEEN: ALARM ONE
FIGURE EIGHTEEN: SUPPLY LED OFF
CHECK AND REPLACE THE
TEMPERATURE SWITCH CONN 3
THERE IS NO WATER IN THE
SYSTEM. SWITCH OFF IMMEDIATELY.
CHECK AND REFILL BEFORE
RESTARTING.
IS THE
PUMP NEON
ILLUMINATED
CHECK SERVICE VALVES ARE
FULLY OPEN.
CHECK AND REPLACE PUMP.
NO
YES
IS THE
PUMP RUNNING
RUN SYSTEM WITH ALARM TO
ALLOW PUMP TO COOL SYSTEM
BEFORE RESETING
NO
YES
IS CONN 3
OPEN CIRCUIT
IS THE
BOILER HOT
CHANGE CONTROL PCB
IS THERE
8V DC ON
C1 MAIN PCB
REPLACE THE MAIN POWER PCB
REPLACE THE CONTROL PCB
NO
YES
IS THERE
230V ON TVR 1
MAIN PCB
CHECK FOR SHORT CIRCUITS
ON WIRING TO THE PUMP.
IF OK REPLACE FS1 FUSE.
T 2A 240V 20 x 5mm
NO
YES
IS THE
MAIN SUPPLY
AVAILABLE
CHECK 240V IS SUPPLIED
TO THE MAIN POWER TERMINAL
CONN5
NO
YES
SUPPLY LED OFF
NO
YES
NO
YES
ALARM TRIPS INSTANTLY ON POWER UP.
BOTH CALL AND ALARM LEDS ARE RED