Vogt P-24AL, Руководство по обслуживанию

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P24AL & P34AL Service Manual
TROUBLESHOOTING
12/2016
8-3
Symptom: Machine Stopped (con’t)
Possible Cause Possible Remedy
High/Low pressure safety switch (1PS or 4PS)
tripped (optional) If the machine stops by low pressure cutout, the
switch will reset automatically when the
pressure raises to the “cut-in” setting. Check
thaw gas valve (18) to make sure it opens
during harvest time. Check Liquid feed valve
(20) to make sure it is feeding during a freeze.
If the machine stops by high pressure cutout,
the switch will have to be manually reset after
the pressure drops below the “cut-in” setting.
Check the head pressure during the next freeze
cycle.
Low oil pressure tripped (OPS) located on
compressor Manually reset the switch after the switch
heater cools. Check the crankcase oil level
(1/4-3/4 full). Add oil if below 1/4 glass before
attempting to restart the machine.
Restart the machine and check net oil pressure
(net oil pressure = oil pump line pressure
minus crankcase suction pressure).
Net oil pressure range:
Mycom = 17-28 psig
Vilter = 35-50 psig
Defective control panel component such as
1PB, 1SS, 1M contact, 2TR See Figure 6-3, Wiring Schematic, and check
for open circuit. Refer to Figures 6-1 and 6-2,
Control Panel to identify parts. Check for
loose wires. Replace defective part, restart
machine, check power supply, and current
draw.
Motor Starter (2M or 3M) for pump or cutter
motor tripped. Check for loose connection on all terminals,
reset overload and check amp draw against
breaker rating. Check voltage and current
unbalance, Chapter 3. Replace motor starter if
defective.