Honeywell F90B Manual page 17

F90A,B SELF-CONTAINED COMMERCIAL ELECTRONIC AIR CLEANER
START
THESE SERVICING INSTRUCTIONS ARE FOR USE BY QUALIFIED PERSONNEL ONLY. TO REDUCE RISK
OF ELECTRIC SHOCK, DO NOT PERFORM ANY SERVICING OTHER THAN CONTAINED IN THE OPERATING
MAKE SURE CELLS
INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO.
ARE CLEAN, DRY,
PROPERLY INSTALLED.
"ON" LED OFF/FAN OFF
CLOSE COVER OR
DEFEAT INTERLOCK.
TURN AIR CLEANER
"ON" LED ON/FAN OFF
ON. CHECK FAN
OPERATION AT LO,
MED, HI SPEEDS.
"ON" LED OFF/FAN ON
OBSERVR "ON'' LED.
LED ON/FAN ON
NO
PUSH TEST BUTTON.
IS "CHECK" LED LIT?
LISTEN FOR
SNAPPING SOUND.
YES
HOLD DOWN TEST NO CHECK INPUT
BUTTON. IS VOLTAGE TO LED.
"CHECK" LED LIT?
NO
YES
REPLACE POWER
RELEASE TEST
YES
SUPPLY AND LED
BUTTON. IS
DRIVER BOARD.
"CHECK" LED LIT?
NO
TURN OFF AIR
CLEANER. SHORT
YES IONIZER TO FRAME
IS "WASH" LED LIT?
WITH TEST LEAD.
TURN ON AIR
NO
CLEANER. IS
"WASH" LED LIT?
CLEAN CELLS,
WIPING IONIZER
WIRES. INSPECT
CELLS FOR
DAMAGED IONIZER
CONTACTS.
REPLACE OR
REPAIR CELLS.
NO
REMOVE CELLS. IS
"WASH" LED LIT?
YES
AIR CLEANER OK.
INSPECT CELLS FOR:
- BENT COLLECTOR
PLATES
YES
REPAIR OR REPLACE
- BROKEN IONIZER
CELL(S)
WIRES
NO
- DIRT ON
INSULATORS
- DAMAGED IONIZER
NO
WITH OHMMETER,
OR COLLECTOR
CHECK FOR SHORT
CONTACT TABS
BETWEEN:
- CELL FRAME AND
COLLECTOR
REPLACE CELLS
TERMINAL.
CELL
- CELL FRAME AND
SHORTED
IONIZER TERMINAL.
CELLS OK.
INFINITE RESISTANCE
1
ELECTRONIC COMPONENTS ON POWER SUPPLY BOARDS ARE NOT FIELD REPLACEABLE. ATTEMPTED SERVICE WILL DAMAGE
BOARDS . IF TROUBLESHOOTING INDICATES A POWER SUPPLY PROBLEM, REPLACE THE ENTIRE POWER SUPPLY ASSEMBLY.
RISK OF ELECTRIC SHOCK
TURN AIR CLEANER OFF. OPEN COVER.
DEFEAT INTERLOCK. CHECK FOR INPUT
VOLTAGE TO SWITCH.
TURN AIR CLEANER OFF. OPEN COVER.
REMOVE ACCESS PANEL. DEFEAT INTERLOCK.
TURN AIR CLEANER ON. JUMPER SWITCH
CONTACTS FOR EACH SPEED IN TURN.
YES
F90B
JUMPER ORANGE
WIRE TO WIRE FROM
YES
SPEED CONTROL
MODULE TO
FAN MOTOR
REPLACE LED.
FAN
OFF
YES
TURN OFF POWER. MAKE SURE FAN
MOTOR ROTATES FREELY. REPLACE
FAN MOTOR IF NECESSARY.
PUSH TEST BUTTON. LISTEN FOR SNAPPING
SOUND.
NO
TURN UNIT OFF. OPEN COVER. REMOVE
ACCESS PANEL. DEFEAT INTERLOCK. TURN
AIR CLEANER ON. CHECK FOR CORRECT
INPUT VOLTAGE TO POWER SUPPLY: CHECK
BOARD TERMINALS P1 AND P2.
DAMAGED
CHECK WIRING BACK THROUGH SWITCH,
INTERLOCK, POWER CORD,
OUTLET, AND CIRCUIT BREAKER.
Fig. 20. F90 electrical troubleshooting procedure.
WARNING
FAN
FAN
ON
OFF
REPLACE
SWITCH.
F90A
TURN OFF POWER.
MAKE SURE FAN
MOTOR ROTATES
FREELY. REPLACE
FAN MOTOR IF
NECESSARY.
FAN
ON
REPLACE SPEED
CONTROL MODULE
NO YES
REPLACE
POWER
SUPPLY.
CORRECT WIRING.
TO USE THIS CHART:
1. FOLLOW THE STEPS IN EXACT SEQUENTIAL ORDER.
2. EACH TIME YOU ISOLATE AND FIX A PROBLEM, GO BACK TO START.
3. REPEAT ALL THE STEPS UNTIL THE AIR CLEANER CHECKS OUT OK.
17
YES
REPLACE SWITCH.
NO
CHECK INPUT VOLTAGE
TO INTERLOCK SWITCH.
YES
NO
ADJUST/REPAIR/
REPLACE
INTERLOCK
SWITCH.
CHECK WIRING BACK
THROUGH POWER CORD
AND OUTLET TO CIRCUIT
BREAKER OR FUSE.
CORRECT WIRING
OR FUSING.
HOLD TEST BUTTON
YES
DOWN; DOES "CHECK"
LED LIGHT?
NO YES
CHECK FOR
VOLTAGE
TO "ON" LED.
NO YES
REPLACE POWER
SUPPLY AND LED
1
DRIVER BOARD.
1
REPLACE LED.
M1525B
68-0103-6 Revised 11-07