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Form 150.72-ICOM6
Issue date: 12/19/2023
Table 7: Micropanel Power Supply
UNIT VOLTAGE
UNIT
MODELS w/o
VOLTAGE
CONTROL
TRANS
-17
-28
MODELS w/
-40
CONTROL
-46
TRANS
-50
-58
A. Minimum #14 AWG, 75°C, Copper Recommended
B. Minimum and Maximum Over Current Protection, Dual Element Fuse or Circuit Breaker
It is possible that multiple sources of
power can be supplying the unit power
panel. To prevent serious injury or death,
the technician should verify that NO
LETHAL VOLTAGES are present inside
the panel AFTER disconnecting power,
before working on equipment.
Voltage limitations
The following voltage limitations are absolute and
operation beyond these limitations may cause serious
damage to the compressor.
Table 8: Voltage Range
VOLTAGE CODE
-17
-28
-40
-46
-50
-58
Compressor heaters
Compressor heaters are standard. Smaller compres-
sors use 70 W heaters and larger compressors use 120
W heaters. If power is OFF more than two hours, the
crankcase heaters must be energized for 18 hours to 24
Johnson Controls
Electrical data
CONTROL
MCA
POWER
NOTE A
115-1-60/50
15 A
200-1-60
15 A
230-1-60
15 A
380-1-60
15 A
460-1-60
15 A
380/415-1-60
15 A
575-1-60
15 A
VOLTAGE RANGE
UNIT POWER
200/3/60
208/3/60
230-3-60
380-3-60
460-3-60
380/415-3-50
575-3-60
hours before restarting a compressor. This ensures that
liquid slugging and oil dilution does not damage the
compressors on start.
OVER CURRENT PROTECTION,
SEE NOTE B
MIN
MAX
10 A
15 A
10 A
15 A
10 A
15 A
10 A
15 A
10 A
15 A
10 A
15 A
10 A
15 A
The unit evaporator heater uses 120 VAC.
Disconnecting 120 VAC power from the
unit, at or below freezing temperatures,
can result in damage to the evaporator
and unit as a result of the chilled liquid
freezing.
MIN.
180
187
207
355
414
360
517
Section 5: Technical data
NF DISC Sw
30 A / 240 V
30 A / 240 V
30 A / 240 V
30 A / 480 V
30 A / 480 V
30 A / 415 V
30 A / 600 V
5 5
MAX.
220
228
253
415
506
440
633
57
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Troubleshooting
