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24
THREE PHASE MONITOR
Oceanaire Three-Phase units are be equipped with phase monitors for
compressor motor protection. The Three-phase Monitor safeguards the
compressor against phase reversal, phase imbalance and/or phase loss.
The monitor is installed in the control box and is equipped with LEDs for
diagnosis of electrical conditions (see diagrams below).
When power is connected and the unit is turned on at the thermostat, the thermostat start
delay will commence. Once the thermostat start delay has timed out, the compressor will
start. If the compressor does not start, remove the control box cover to observe the LEDs
in the Phase Monitor. The LEDs will signal the following:
THREE PHASE MONITOR - ICM401/ICM402
GREEN - ON (Proper Operation) The compressor contactor is energized.
RED - FAULT CONDITION Correct the issue with the incoming power and re-start the
unit. The Phase Monitor will not allow the compressor to start until the power FAULT is
corrected.
In the event of a power interruptions or changes, the Phase Monitor will change state
accordingly and will remain in FAULT until the power condition is corrected.
NOTICE
UNIT IS EQUIPPED WITH 3-PHASE POWER
MONITOR (WITH LEDs)
LED INDICATION
GREEN = PROPER OPERATION
RED = PHASE REVERSAL, PHASE LOSS or
PHASE IMBALANCE
START DELAY IS CONTROLLED
IN THE THERMOSTAT
ICM THREE-PHASE
MONITOR
CONTROL BOX LABEL
L1
L3
L2
C
Y
Y-OUT
ON
FAULT
LEDs
THREE PHASE MONITOR - SSAC
GREEN-BLINKING - Start delay, up to 120 sec.
GREEN - Proper Operation
RED/GREEN-BLINKING - signals reverse phase rotation. Switch any two of the power
leads for the unit, NOT THE MONITOR LEADS, and re-start.
RED-BLINKING - signals improper voltage and/or phase loss. Correct the power prob-
lem, then re-start the unit.
In the event of a power interruption, the unit will re-set to a start-up condition. The Phase
Monitor will not allow the unit to start until power is corrected.
NOTICE
UNIT IS EQUIPPED WITH 3-PHAS E POWER
MONITOR (WITH LED)
LED INDICATION
GREEN (BLINKING) = START DELAY
GREEN = PROPER OPERATION
RED/GREEN (BLINKING) = PHASE REVERSAL
RED (BLINKING) = IMPROPER LEG VOLTAGE
OR PHASE LOSS
START DELAY = 120 SE CONDS
L1
L3
L2
NO
COM
SSAC THREE-PHASE
MONITOR
LED
CONTROL BOX LABEL
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