What should the settings be for the dew point controller for the XC/XCNA model?

Product Line:

XCNA

XC

XC 540

XC 630

XC 680

Environment:

Applications that use either XC or XCNA models

Dew point controller ST1 (Hygrometer)

Cause:
Set points for the dew point controller need to be confirmed/configured.

Resolution:

CAUTION!
These instructions are intended for use by authorized service personnel who have training, knowledge, and experience in:
• Installing electrical equipment and PV power systems (up to 1000 V)
• Applying all applicable installation codes
• Analyzing and reducing the hazards involved in performing electrical work
• Selecting and using personal protective equipment
Perform LOTO to make sure all energy in the inverter is zero.

1. Wearing appropriate PPE, remove the lock‑out and tag‑out devices from the AC auxiliary supply.

   • If your system’s auxiliary is supplied from the AC mains, remove the LOTO devices from the main AC circuit breaker.
   • Energize only AC power—all PV/DC inputs must remain off and locked out.

2. Turn ON the AC auxiliary supply (or AC mains) and verify that ST1 powers up.

   • The inverter ON/OFF switch must be in the ON position.

3. Upon powering up, ST1 initializes and then shows its settings.

   • Follow the instructions supplied with ST1 to check and, if necessary, change the following settings.
   • (See the attached PDF for how to navigate the ST1 settings.)

Required ST1 settings (Dew Point Controller):

• Operation Mode: n2
• Dew point control alarm for Relay 1: Hd1
• Relative Humidity Setting: 80%