Page 4 of 12
Effective Date: 6 May 2022
Revision: 02
II. Startup
Phase Monitor (CGS only)
Purpose: Units configured for 3-phase electrical have a phase monitor to check incoming electrical
power.
Operation: The phase monitor is factory adjusted by Haskris according to the proper electrical
settings for the unit. Do not adjust the knobs on the phase monitor without discussion and approval
from Haskris.
The phase monitor will show a solid green LED if the voltage and phase from the service disconnect
is correct (Figure 1). If the phase monitor has a solid or flashing red LED, contact a licensed
electrician to correct the fault (Figure 2).
•
Reversal is caused by the 3 lines being in an improper sequence. To correct a reversal, switch
any 2 of the 3 line connections. Make this switch at the disconnect, not in the unit.
•
Loss/unbalance is caused by a percentage difference in voltage between the 3 lines relative to
each other.
•
Undervoltage is caused by a percentage difference in voltage between the 3 lines compared to
the line-line voltage knob setting.
•
Overvoltage is caused by the voltage between the 3 lines being >10% over the line-line
voltage knob setting.
Figure 1:
Phase monitor
Figure 2: Phase fault LED status patterns