13.12
Low beater counts.
A. Chamber is frozen too hard
A. Verify correct brix, Level Control
or solid.
and Thaw/Freeze settings. Defrost
chamber, refill to 90% and refreeze
(see Sections 9.1, 10 and 11).
B. Lower motor control board
B. Replace board.
failure.
C. Beater motor capacitor.
C. Check motor capacitor and replace,
if
necessary.
D. Beater motor problem.
D. Replace beater motor.
13.13
Excessively rapid
A. Lower Board problem.
A. Replace lower board.
rising/falling beater
B. Buck/Boost transformer
B. Disconnect and replace
counts.
problem (if used).
Buck/Boost transformer.
13.14
Display door light out
A. Failed fluorescent tube.
A. Replace fluorescent tube.
or flickering.
B. Blown fuse.
B. Check inline fuse (in electrical box.)
Check wiring from contactor,
through ballast, to lamp connection.
C. Failed or failing fluorescent
C. Replace ballast.
ballast.
D. Failed LEDs.
D. Replace failed LED strip.
13.15
Ammonia smell in
A. Start capacitor has failed.
A. Verify blown capacitor. Replace
electrical box.
start capacitor and check start
relay. Replace if necessary.
13.16
Fan motor not running. A. Unit in “Defrost” cycle.
A. Check fan after completion of
defrost
cycle.
B. Failed compressor or fan
B. Test compressor or fan relays on
relay on relay board.
Relay Board for 24VAC output and
5VDC input. Replace Relay Board,
if
necessary.
C. Lower motor control board
C. Replace lower board.
failure.
D. Contactor not engaging.
D. Check for 24 volt at coil and
220 volt at T1 and T2. Replace
contactor,
if
necessary.
E. Bad fan motor.
E. Replace fan.
ELECTRONIC CONTROLS
13.17
LCD readout garbled
A. Voltage spike or noise.
A. Press “CANCEL” several times.
or blank.
B. Low or no voltage to unit or
B. Check L1 & L2 of contactor for
loss of 5VDC signal.
220 VAC and indicator light on the
lower board for +5 VDC. Install
Buck/Boost transformer or replace
lower board, if necessary.
13.18
One or more keypad
A. Cable connecting Main
A. Check for loose or incorrect
buttons will not
Control (upper) board to
connections.
function.
keypad not connected
properly.
B. Faulty control cable.
B. Replace keypad.
13.19
Clock shows incorrect
A. Initial setting incorrect.
A. Change clock settings as described
time/date.
in Section 7.2 of this manual.
B. Clock battery failure.
B. Replace clock battery on upper
board.
13.20
Faulty tank pressure
A. Pressure transducer failure.
A. Check transducer and replace, if
reading on LCD.
necessary.
B. Possible short in wiring from
B. Clean and dry both ends of cable,
transducer to PC board.
and check for loose connections.
C. Poor contact within connector. C. Reposition or replace transducer.
(Item 13.20 continued on next page.)
31
TROUBLE CAUSE
REMEDY
Summary of Contents for FBD562
Page 49: ...49 14 8 LOWER BOARD SCHEMATIC FBD 562 562 ELECTRICAL BOX SCHEMATIC ...
Page 50: ...50 14 9 UPPER BOARD SCHEMATIC FBD 563 563 SCHEMATIC UPPER BOARD ...
Page 51: ...51 14 10 LOWER BOARD SCHEMATIC FBD 563 563 ELECTRICAL BOX SCHEMATIC ...
Page 52: ...52 14 11 UPPER BOARD SCHEMATIC FBD 564 564 SCHEMATIC UPPER BOARD ...
Page 53: ...53 14 12 LOWER BOARD SCHEMATIC FBD 564 564 ELECTRICAL BOX SCHEMATIC LPB1 ...