ELECTRONIC CONTROLS
14.17 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 test points on lower
and upper board for +5 VDC (see
Figure 14.3). Install Buck/Boost
transformer or replace board,
if necessary.
14.18 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.
14.19 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.
14.20 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.
D. Low 15VDC from Lower D. Check for 15VDC on lower board
Board. test points (see Figure 14.3).
Replace lower board, if necessary.
E. Upper board failure. E. Replace main control (Upper)
board.
REFRIGERATION
14.21 Compressor won't start. A. Incorrect start procedure. A. Press “Def”, then “Run” to start.
B. In 2 minutes, compressor B. “Run Beater” or “Def Beater”
delay. indicates delay mode
C. Out of CO2, Syrup or Water. C. Check pressure readouts for
70-72 psi (482.6-496.4 KPa),
adjust regulators,if necessary.
D. Start capacitor or relay D. Test start capacitor and start relay.
problem. Replace, if necessary.
E. Contactor failure. E. 1. In Manual On/Off, activate
“Compressor” . DO NOT RUN
COMPRESSOR FOR MORE
THAN 10 SECONDS! If
contactor energizes, quickly
check voltage across contactor
T1 and T2 for 220 volt. If no
voltage reading, replace
contactor.
2. In Manual On/Off, activate
“Compressor”. DO NOT RUN
COMPRESSOR FOR MORE
THAN 10 SECONDS! If
contactor does not energize,
quickly check voltage across
contactor coil terminals for
24VAC. If voltage is present,
replace contactor.
F. Relay board not sending F. Test contactor relay board through
power to contactor coil. manual ON/OFF menu. Replace
relay board, if necessary.
(Section 14.21 continued on next page.)
TROUBLE CAUSE REMEDY
25
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