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MON.
10:00 AM
Low Evap.
Pressure
MON.
10:00 AM
Low Evap.
Pressure
Brine
MON.
10:00 AM
Low Oil
Pressure
MON.
10:00 AM
High
Pressure
MON.
10:00 AM
Evap. Trans.
or Probe
Error
MON.
10:00 AM
Motor Con-
troller – Ext.
Reset
MON.
10:00 AM
High
Discharge
Temp.
MON.
10:00 AM
High Oil
Temp.
MON.
10:00 AM
Power
Auto-Restart
Failure
MON.
10:00 AM
Power
Failure
Low Evap.
54.3
54.4
Pressure
PSIG (R-22)
PSIG (R-22)
Transducer
25
25.1
(LEP)
PSIG (R-134a) PSIG (R-134a)
LEP external
Set to Job
Set to Job
control (Brine
Spec.
Spec.
units only)
Low Oil
25
15
Pressure
PSID
PSID
Transducer
(OP)
High Pressure
265
205
Safety Control
PSIG (R-22)
PSIG (R-22)
(HP)
180
120
PSIG (R-134a) PSIG (R-134a)
Evap. Pressure
Transducer or
Leaving Chilled
Water Thermis-
tor (RS1)
CM2 or Solid
State Starter
(RT2)
Discharge Temp.
220°F
219°F
Thermistor
(RT2)
Oil Temperature
170°F
169°F
Thermistor
(RT3)
Micro Board
8.29VDC
7.84VDC
undervoltage
circuit on 5V
unregulated
supply
Micro Board
8.29VDC
7.84VDC
undervoltage
circuit on 5V
unregulated
supply
To restart, press
compressor switch
from STOP/RESET
to START position
To restart, press
compressor switch
from STOP/RESET
to START position
Will restart when
pressure increases
to 25 PSID. To
restart, press com-
pressor switch from
STOP/RESTART to
START position.
Will restart when
Pressure falls to
205 PSIG. To restart
press compressor
switch from STOP/
RESET to START
position
To restart press
compressor switch
from STOP/RESET
to START position
Reset the device
that caused the shut-
down. Chiller will
start automatically.
To restart press
compressor switch
from STOP/RESET
to START position.
To restart press
compressor switch
from STOP/RESET
to START position
Optional AUTO
Will restart automa-
Restart Plug is
tically when voltage
installed on
reaches 8.29VDC.
Micro Board
An undervoltage
circuit on the Micro
Board monitors the
5VC unregulated
supply for an under-
voltage condition.
Auto restart plug
To restart, press
is removed on
compressor switch
Micro Board
to STOP-RESET
Position and then to
START position
See OPERATION
ANALYSIS Table 2
Symptom 2
See OPERATION
ANALYSIS Table 2
Symptom 2.
Refer to OPERATION
ANALYSIS Table 2
Symptoms 4, 5, 6, 7,
9, 10, 11
See Operational
Analysis Table 2
Symptom 1 High
Discharge Pressure
Defective Evap. Pressure
Transducer or Leaving
Chilled Water thermistor
(RS1). LCWT minus satu-
ration temperature is less
than –2.5°F or greater than
25°F. Checked every 10
minutes following a 10 min.
bypass at start-up.
CM2, or Solid State
Starter has shutdown
chiller
Condenser tubes dirty or
scaled or high condenser
water temperature. (See
Symptom 1, Table 1.)
Dirty oil filter or restricted
oil cooler line. Change oil
filter. Refer to OPERATION
ANALYSIS Table 2,
Symptom 9.
Power Failure.
Power Failure
(Continued on page 46)
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