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

Published date: 09 June 2020

Warning:
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.  


Issue: 
Settings for the dew point controller ST1 (Hygrometer)

Product Line:
XCNA, XC, XC 540, XC630, XC680

Environment:
Applications that use either XC or XCNA models

Cause:
Set points for the dew point controller

Resolution:
PLEASE NOTE: ONLY QUALIFIED PERSONNEL WITH PROPER TRAINING AND EQUIPMENT CAN WORK ON THESE UNITS


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 then you will have to remove the lock-out/tag-out devices from the main AC circuit breaker. Energize only AC power-all PV/DC inputs should remain off and locked out. 

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 will initialize and then show its settings. Follow the instructions supplied with ST1 to check and if necessary to change the following settings:  (Please see the attached pdf on how to navigate through settings


The settings for the Dew Point Controller are as follows:

Operation Mode: n2

Dew point control alarm for relay 1: Hd1

Relative Humidity Setting:80%

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