Carrier 19QA - Manual (Page 16)

TROUBLESHOOTING
SYMPTOM PROBABLE CAUSE REMEDY
Unit hums and vibrates
excessiveiy.
Motor/pump assembly out of alignment. Check alignment and adjust if necessary.
Motor/pump assembly holddown bolts are
loose. Check hoiddown bolts and tighten as necessary.
Pump does not puli a 29 in.
Hg vacuum (25 mm Hg
absolute).
Pump and oil separator oil is diluted with
refrigerant. Change oil in pump and oil separator as specified in mainte­
nance section on page 15.
Valves and valve plates are worn. Replace valves and valve plates in pump.
Unit is plugged into electri­
cal outlet but does not
start.
The ON/OFF switch, high-pressure switch,
motor thermal overload and/or motor wind­
ing are faulty. Test all components for proper operation and replace as
needed.
Unit is plugged into a nonoperational
outlet.
Try another outlet and test for presence of voltage.
Unit shuts off on the high
pressure switch. All valves on the discharge side of the
pump are not open. Open ail valves on the discharge side of the pump.
Cutout setting on the switches is incorrect. Adjust switch as necessary.
Inadequate water flow through the
condenser.
Increase water flow or use a colder water source.
Noncondensable gas has accumulated in
the storage tank.
Purge noncondensable gases from storage tank.
Motor draws high amps at
start-up. Pump oil is very cold. Warm up pump by running it with the suction and discharge
service valves open to the atmosphere.
Compressor is damaged at
start-up. Liquid refrigerant entered the suction valve. Check pump for internal damage.
Storage tank relief valve is
relieving refrigerant gas. Storage tank contains excessive noncon­
densable gas. Bleed noncondensable gases from storage tank.
Storage tank is placed in a hot room
(above 115 F [46 C]). Move storage tank to a cooler room.
Liquid and vapor recovery
rates are slower than
specified.
Vapor valve connection on the chiller is
smaller than V
2 inches in diameter.
Install a V 2 in. vapor valve on the chiller.
There is a restriction in the refrigerant hose
system. Check all refrigerant hose valves and verify that they are open.
Purge unit is constantly
open to remove noncon­
densable gas from the stor­
age tank.
Chiller probably has a severe leak. Stop the recovery process.
Copyright 1994 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obiigations.
Book|2 |2 PC 221 Cataiog No 531-963 Printed in U S A. Form 19QA-2SI Pg 16 9-94 Replaces: 19QA-1 SI
Tab 5a 5d