Du Pont SORVALL RC-5 Service Manual page 115

Son/all®
CentrifugesRefrigeration
SystemTable
5-1.
Troubleshooting Chart, Refrigeration
CircuitsPROBLEM:
Refrigeration system is unable
toprovide
desired temperature
inRUN
or
HOLD.Check
calibration of temperature meter.
Seepara.
7-6, b. Is meter
calibrated?NOYESCheck
condenser assembly for
dirt
infins.
Is it
dirty?YESNOCheck
evaporators.
Is
icingpresent?YESNO•^j
Calibrate
temperature
meter.Clean
condenser
assembly.Defrost
evaporator.
Seepara.
2-6.Visually
check condenser
fan.Is
fan
loose, are
bladesbent,
is motor running?YESNORepair
or replace
fan
bladeor
motor.Check
line
voltage. Is
voltage90%
of nameplate
rating?NOYESCheck
run capacitor.
|
NOIs
it
good?YESCheck
suction pressure on compressor,
see
para.6-16,
d. Abnormally low pressure
may
indicatelow
charge.
Check for
leaks,
see Section
6-16,
e.Repair
and
recharge,
see Section 6-16,
c.Have
powersupply
corrected.Replace
run
capacitor.8
79RCS
1545-3