Specifications

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• low cooler refrigerant temperature/pressure

• condenser high pressure or low pressure

• inadequate water/brine cooler and condenser ﬂow

• high, low, or loss of voltage

• excessive motor acceleration time

• excessive starter transition time

• lack of motor current signal

• excessive motor amps

• excessive compressor surge

• temperature and transducer faults

Starter faults or optional protective devices within the starter

can shut down the machine. These devices are dependent on

what has been purchased as options.

If compressor motor overload or ground fault occurs,

check the motor for grounded or open phases before at-

tempting a restart.

If the controller initiates a safety shutdown, it displays the

fault on the LID with a primary and a secondary message,

and energizes an alarm relay in the starter and blinks the

alarm light on the control center. The alarm is stored in memory

and can be viewed in the PIC Alarm History table along with

a message for troubleshooting.

To give a better warning as to the operating condition of

the machine, the operator also can deﬁne alert limits on vari-

ous monitored inputs. Safety contact and alert limits are de-

ﬁned in Table 3. Alarm and alert messages are listed in the

Troubleshooting Guide section, page 53.

SHUNT TRIP — The optional shunt trip function of the PIC

is a safety trip. The shunt trip is wired from an output on the

SMM to the motor circuit breaker. If the PIC tries to shut

down the compressor through normal shutdown procedure

but is unsuccessful for 30 seconds, the shunt trip output is

energized and causes the circuit breaker to trip. If ground

fault protection has been applied to the starter, the ground

fault trip will also energize the shunt trip to trip the circuit

breaker.

Table 3 — Protective Safety Limits and Control Settings

MONITORED PARAMETER LIMIT APPLICABLE COMMENTS

TEMPERATURE SENSORS

OUT OF RANGE

−40 to 245 F (−40 to 118.3 C) Must be outside range for 2 seconds

PRESSURE TRANSDUCERS

OUT OF RANGE

0.08 to 0.98 Voltage Ratio

Must be outside range for 2 seconds.

Ratio = Input Voltage ÷ Voltage Reference

COMPRESSOR DISCHARGE

TEMPERATURE

.220 F (104.4 C) Preset, alert setting conﬁgurable

MOTOR WINDING TEMPERATURE .220 F (104.4 C) Preset, alert setting conﬁgurable

BEARING TEMPERATURE .220 F (104.4 C) Preset, alert setting conﬁgurable

EVAPORATOR REFRIGERANT

TEMPERATURE

,33 F (for water chilling) (0.6° C)

Preset, conﬁgure chilled medium for water

(Service1 screen)

3 F (1.7° C) less than Design Refrigerant

Temperature (set point adjustable from

0 to 40 F [−18 to 4 C] for brine chilling)

Conﬁgure chilled medium for brine (Service1

screen). Adjust brine refrigerant trippoint for

proper cutout

TRANSDUCER VOLTAGE ,4.5 vdc . 5.5 vdc Preset

CONDENSER PRESSURE — SWITCH

.185 ± 7 psig (1276 ± 48 kPa),

reset at 120 ± 10 (827 ± 69 kPa)

Preset

— CONTROL .200 psig (1379 kPa) Preset

OIL PRESSURE ,15 psid (103 kPad) Preset, alert setting preset at 15 psid (103 kPad)

LINE VOLTAGE — HIGH .110% for one minute

Preset, based on transformed line voltage

input to the Starter Management Module

— LOW ,90% for one minute or <85% for 3 seconds

— SINGLE-CYCLE ,50% for one cycle

COMPRESSOR MOTOR LOAD

.110% for 30 seconds Preset

,10% with compressor running Preset

.10% with compressor off Preset

STARTER ACCELERATION TIME

(Determined by inrush current

going below 100% compressor

motor load)

.45 seconds

For machines with reduced voltage mechanical

and solid state starters

.10 seconds

For machines with full voltage starters

(Conﬁgured on Service1 screen)

STARTER TRANSITION .75 seconds Reduced voltage starters only

IMPELLER CLEARANCE

Displacement switch open

(bearing sensor −40 F [−40 C])

Thrust movement excessive