CONTENTS
GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-33
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Board Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Sensors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
• CONDENSER ENTERING FLUID SENSOR
Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
• LEAD/LAG DETERMINATION
• CAPACITY CONTROL OVERRIDES
Ice Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Service Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Temperature Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Demand Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
(4 to 20 mA Controlled)
PRE-START-UP. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33,34
System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Actual Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
• TEMPERATURES
• VOLTAGE - ALL UNITS
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-44
• CONTROL COMPONENTS
Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
• MOISTURE-LIQUID INDICATOR
®
• MINIMUM LOAD VALVE
• PRESSURE RELIEF DEVICES
Page
Thermistors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44,45
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . .44-52
OFF
• COOLING LOAD SATISFIED
• THERMISTOR FAILURE
• LOW SATURATED SUCTION
• COMPRESSOR SAFETIES
Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
START-UP CHECKLIST FOR 30MP LIQUID
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1 to CL-8
CHILLER
This publication contains Start-Up, Service, Controls, Oper-
ation, and Troubleshooting information for the 30MPW water-
cooled chillers and the 30MPA air-cooled chillers. See Table 1.
These liquid chillers are equipped with ComfortLink controls
and conventional thermostatic expansion valves (TXVs). The
30MPA units and the 30MPW units with optional medium
temperature brine are also equipped with liquid line solenoid
valves (LLSVs).
This unit uses a microprocessor-based electronic control
system. Do not use jumpers or other tools to short out or
bypass components or otherwise depart from recom-
mended procedures. Any short-to-ground of the control
board or accompanying wiring may destroy the board or
electrical component.
UNIT MODEL
30MPA,MPW015
30MPA,MPW020
30MPA,MPW030
30MPA,MPW040
30MPA,MPW045
Conventions Used in This Manual -
ing conventions for discussing configuration points for the
local display (scrolling marquee or Navigator™ accessory)
will be used in this manual.
Point names will be written with the mode name first, then
any sub-modes, then the point name, each separated by an
arrow symbol (. Names will also be shown in bold
and italics. As an example, the Minimum Load Valve Select
Point, which is located in the Configuration mode, Option 1
sub-mode, would be written as ConfigurationOPT1
MLV.S.
This path name will show the user how to navigate through
the local display to reach the desired configuration. The user
would scroll through the modes and sub-modes using the
and
represents pressing
menu structure.
2
GENERAL
CAUTION
Table 1 - Unit Sizes
NOMINAL TONS
keys. The arrow symbol in the path name
to move into the next level of the
ENTER
15
20
30
40
45
The follow-