P24AL & P34AL Service Manual
TROUBLESHOOTING
12/2016
8-5
Symptom: Freeze-up due to ice failing to discharge
Possible Cause
Possible Remedy
Freeze timer (1TR) set to long
Adjust timer or replace if defective. See Figure
9-2.
Extended freeze period (if 2PS is used)
Check
freezer
pressure
switch
(2PS)
adjustment. See Figure 9-3 for adjustment and
Table 7-2 for average hole size. Make sure all
water distributors are in place (one in each
tube).
Thaw time too short (2TR)
Adjust thaw timer (2TR) to allow all ice to
clear the cutter and ice discharge opening with
at least 30 seconds to spare. Replace defective
timer. See pressure regulating valve adj.
Thaw pressure to low
The thaw gas regulator should be adjusted to
increase the pressure in the freezer to 60-65
psig during a harvest. Isolate and repair or
replace the valve as needed.
Insufficient heat for thawing due to low
condensing pressure
The head pressure should be maintained form
175-190 psig (maximum 200) usually by a
water regulating valve or fan cycling switch.
Check to make sure these controls are working
properly. Cold prevailing wind can also be a
factor.
Insufficient heat due to non-condensables
(usually air) in the system
If non-condensables are present with the
refrigerant, the saturated temperature will not
relate to the pressure reading at the receiver
and the refrigerant will be cooler, although
pressure will be high. Air can be purged from
the system by following the procedure in the
Section 9, “Purging Non-Condensables”.
Insufficient heat due to low refrigerant charge
The refrigerant level in the receiver should be
near the operating mark at the end of a freezing
cycle to provide enough volume of warm gas
for harvesting. DO NOT OVERFILL
RECEIVER. See Table 3-2
Cutter or cutter disc does not turn
Check cutter gear reducer and drive gear for
proper operation and alignment. Check for
broken gear teeth or sheared shaft key.
Replace defective parts.
Compressor not running unloaded during thaw
cycle. (for dedicated high side only)
Check compressor motor Amp draw. During
the thaw cycle, the compressor motor Amp
draw should be 60 - 70% of normal amp draw
during the freeze cycle. Check compressor
unloader solenoid coil (UR) to make sure it is
energized and the valve opening during the
thaw cycle.
Summary of Contents for P-24AL
Page 1: ...12 2016 P 24AL P 34AL TUBE ICE MACHINE Service Manual 5000 ...
Page 10: ...P24AL P34AL Service Manual TABLE OF CONTENTS 12 2016 vi ...
Page 15: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 5 Figure 1 2 P24AL Right Side ...
Page 16: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 6 Figure 1 3 P24AL Back Side ...
Page 17: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 7 Figure 1 4 P24AL Left Side ...
Page 18: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 8 Figure 1 5 P34AL Front Side Control Panel ...
Page 19: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 9 Figure 1 6 P34AL Right Side ...
Page 20: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 10 Figure 1 7 P34AL Back Side ...
Page 21: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 11 Figure 1 8 P34AL Left Side ...
Page 22: ...P24AL P34AL Service Manual INTRODUCTION 12 2016 1 12 ...
Page 62: ...P24AL P34AL Service Manual START UP OPERATION 12 2016 5 8 ...
Page 84: ...P24A P34A Service Manual TROUBLESHOOTING 12 2016 8 12 ...
Page 110: ...P24AL P34AL Service Manual SERVICING OPERATIONS 12 2016 9 26 ...
Page 126: ...P24AL P34AL Service Manual TABLES CHARTS 12 16 16 11 8 ...
Page 130: ...P24AL P34AL Service Manual INDEX 12 2016 12 4 ...
Page 131: ...Appendix A ...
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