24
FIGURE TWENTY ONE: ALARM THREE
IF THE PUMP NEON ON THE PCB DOES NOT
ILLUMINATE WHEN THE CALL IS ILLUMINATED
REPLACE THE CONTROL PCB.
YES
IS THE
PUMP NEON
ILLUMINATED
CHECK AND OPEN SERVICE VALVES.
CHECK AND REPLACE THE PUMP.
NO
IS THE PUMP
RUNNING
CHECK FOR A RESTRICTION IN THE FLOW.
CHECK THE BYPASS, CHECK THE SERVICE
AND RADIATOR VALVES.
CHECK FOR AIR IN THE SYSTEM.
NO
YES
ALARM TRIPS AFTER A
FEW MINUTES OF OPERATION
FIGURE TWENTY TWO: ALARM FOUR
YES
TRIPPING
DAILY
CHECK FLOW AND PRESSURE.
CHECK FOR TEMPORARY RESTRICTIONS IN FLOW.
CHECK CONNECTIONS ON THERMOSTATIC SWITCH
CONN3.
CHANGE CONTROL PCB.
NO
OCCASIONAL TRIPPING
CHECK FLOW AND PRESSURE.
CHECK FOR TEMPORARY RESTRICTIONS IN FLOW.
CHECK CONNECTIONS ON THERMOSTATIC SWITCH
CONN3.
RESET.
FIGURE TWENTY: ALARM TWO
THERE IS NO WATER IN THE SYSTEM.
SWITCH OFF IMMEDIATELY.
CHECK AND FILL BEFORE RESTARTING.
ALARM TRIPS DURING
SELF CHECKING BUT NOT
INSTANTLY