Carrier 16JA - Manual (Page 9)

TROUBLESHOOTING GUIDE (CONT)
SYMPTOM OR DIFFICULTY POSSIBLE CAUSE REMEDY
D. Machine shuts down on
safety control.
1. Motor overloads. 1. Reset all motor overloads and
check reason for failure.
2, Hermetic pump overload has
tripped.
2. a. If pump is out of liquid, add
solution or water.
b. If pump is solidified, de-
solidify. (Refer to Solution
Desolidification.)
3. Shutdown on low-temperature
cutout.
3. a. Check low-temperature cut­
out setting.
b. Control point adjuster set­
ting too low. Turn up chilled
water controller to design.
c. Check condensing water tem­
perature control.
E. Solidification during
shutdown.
1, Dilution cycle not long enough. 1. Check setting of dilution ther­
mostat, Should be 140F. If still
solidifies reset to lower cutout
temperature.
2. Improper closing of capacity
control valve.
2. Check valve closure, Desolidify,
3. Machine is shut down, but con­
densing water pump is still
running.
3. Manually shut down condensing
water pump.
F, Suspect air leakage. Leakage into vacuum side of
machine. Determine noncondensable ac­
cumulation rate. Refer to the
Carrier Standard Service Tech­
niques, publication SM-16.
G. Loss of vacuum at
shutdown.
Leakage into vacuum side of
machine. Leak test machine.
H, Failure to keep ma­
chine purged.
1, Leakage above the pumping rate
of purge.
1. a. Perform leak rate check,
b. Leak test machine.
2. Purge not performing properly. 2. a. Valves not opened properly.
Check to see that all valves
are in correct position,
b. Purge solidified. Desolidify.
c. Lack of solution flow to purge
from solution pump. Con­
tact
your Carrier repre­
sentative.