36
MAKE
PROPER
BURNER
ADJUSTMENT
DID
OPERATE
CONTROL LED
COME
ON?
DID
PTFI LED
COME ON AFTER
SUITABLE
DELAY?
DID
AIR FLOW
LED
COME
O.C. ON
ALARM BLINKING
NO HEA T
INSTALL DC VOLTMETER
IN TEST JACKS
SHUT FUEL
SUPPLY COCK
WAIT
5
MIN
RESET CONTROL
PROGRAMMER OR
MEC120 DEFECTIVE
MAKE IT
CALL FOR HEAT
SEE SITUATION
SEE SITUATION
IS
HEAT
BEING
CALLED
FOR?
ON?
#3
#2
YES
YES
YES
NO
SITUATION #1
NO
NO
NO
YES
YES
YES
YES
DID PTFI
IS
SYSTEM
RUNNING?
ALIGN
SCANNER
REPAIR
WIRING
SUCCESSFUL
RESET
REPLACE
PROGRAMMER
DID
FLAME
LED COME
ON?
YES
MP100 4-7 SECONDS
MP230 PREPURGE DELAY TIME
NO
YES
NORMAL LOCKOUT
NO
NO
NO
NO
NO
YES
AMPLIFIER
DEFECTIVE
OR MEC120
REPLACE SCANNER
REPEAT
SITUATION #1
LED GO OFF
AFTER SUITABLE
DELAY?
MicroM
SERVICE GUIDE
TO RESET THE CONTROL THE CONTROL
POWER MUST BE ON. (L1-L2)
IS
THERE A
GOOD
FIRE?
IS
PROPER
ACROSS
S1 & S2
VOLTAGE
IS
WIRING &
TERM. CONTACT
PRESSURE
OK?
S1 S2
IS
SCANNER
POSITION
OK?
PROPER
PILOT VOLTAGE
(120V) ACROSS
3, 2
YES
PROPER
IGNITION
VOLTAGE (120V)
ACROSS
4, 2
YES
PROPER
MAIN VALVE
VOLTAGE (120V)
ACROSS
5, 2
YES
CHECK FUSE IN
CHASSIS
NO
CHECK OUTPUT
YES
WIRING
REPLACE
MEC120
NO
REPLACE
MEC120
NO
CHECK OUTPUT
YES
WIRING
CHECK OUTPUT
YES
WIRING
TEST
JACKS
AMPLIFIER MODULE
ALL TYPES
4-10 VDC