Instruction manual

Maximum Series Portable Chiller : Air & Water-Cooled : M1 Series Instrument
Page: 38
ADVANTAGE ENGINEERING, INC.
525 East Stop 18 Road Greenwood, Indiana 46142
317-887-0729 Fax: [phone]
Service Department Fax: [phone]
Email: [e-mail]
4.1 UNIT WILL NOT START
A. Power off. Check main disconnect.
B. Main line open. Check fuses.
C. Loose terminals. Tighten terminals with POWER OFF.
D. Control circuit open. Check control voltage fuses and transformer.
4.2 COMPRESSOR HUMS BUT WILL NOT START
A. Contactor problem. Check contacts and contactor operation.
B. Low voltage. Check voltage at main and at the unit. If voltage
is OK at the main but low at the unit, increase wire size. If low at
main, consult your local power company. Voltage must be +/- 10%
nameplate rating.
C. No power on one phase of a three phase unit. Check fuses in
control panel and main disconnect. Also check unit wiring, main
plant fuse and wiring. If the problem is with the main power supply
coming into the plant, call the local power company.
D. Loose terminals. Power off and follow all company lock-out tag-out
procedure before tightening terminals.
4.3 SHUTS OFF ON HIGH PRESSURE LIMIT
Note: Units may be equipped with either an adjustable
ornon-adjustable“xed”highpressureswitch.
If the refrigerant pressure exceeds the setting of
the adjustable switch it must be manually reset
when the discharge pressure falls to a safe level.
Thenon-adjustable“xed”highpressureswitch
will automatically reset when the discharge
pressure falls to a safe level.
A. Air-cooled units:
1. Insufcient condenser air ow.
Checkcondenserlterfordirt,nsmay
be plugged with dirt or foreign material.
Also, check for proper fan rotation.
Note: All enclosure panels must be attached.
Adjustable High
Pressure Switch
Fixed High
Pressure Switch
WARNING: Before troubleshooting or servicing this unit, follow all company
lock-out tag-out procedures.