Frequently Asked Questions

Learn about our most frequently asked questions. If you have any further questions please contact us today!

Can a customer reserve a unit that is currently rented to another customer?

Customers wanting to rent a specific unit or size can be entered and tracked using the waiting list function, which will prompt the system operator when a unit becomes available.

Can I print receipts?

Receipts may be reprinted by clicking on the “View” button in “View/Edit Tenant – Table” or “View/Edit Tenant – Form”, select the desired transaction and click Print.

How do I issue a credit to a customer?

Once the customer’s record is selected, click on the “Payment” button, then double click in the box next to “Misc. Credits”. Fill out the appropriate information and click “OK”, then click “OK” in the “Daily Transaction” window and in the “Paid By” window. Note: If the “Rent” field is not active, enter “1” in the additional months to pay window.

What reports should I print at close?

The “Daily Site Summary” report prints automatically with the daily close. You also have the option of printing a “Rental Activity”, “Bank Deposit Log”, “Trial Balance” and “Activity Log” report.

How can I keep track of merchandise sales to non-tenants?

Create a size code with a rental rate of “0” and area = “0”, then add a unit using that size code. Assign that unit to “Cash Sales”, and then, under the “Other” tab, set late cycles to “None”. Note: This unit must be in “Rented” status.

I setup a rate change and it didn't take effect. What did I do wrong?

To correctly implement a rate change, one record must be created for each size code affected, and all fields in each record must have an entry. Note: “Standard Rate”, referenced in “Units to be Affected”, is the rent rate per unit as shown in the Size Code Chart.

We have just completed a new building. How do I add these units to the software?

New units can be added in the Maintenance menu in Property Manager by clicking on Add/Remove units. Note: If the sizes are different than previously installed units, you will also need to add the new size codes under the Maintenance Menu.

I have a tenant with several units who would like just one bill and one passcode. Can I do that?

Yes, multiple units may be associated with one tenant, giving the advantage of single passcode and multiple-unit billing. This can be set up in the “View/Edit Tenant – Table” or “View/Edit Tenant – Form” by clicking on the “Status” button.

I just installed the software and I am now ready to open my site. How do I adjust the system dates?

From the “Maintenance” menu, select “Site Information”, “Site Setup” and the “System Dates” tab. Click in the appropriate field to enter the dates.

I am finished using the demo database. How do I setup my software to begin business?

Before you start using the program to manage your facility you must first delete the demo database. Installing the site customization disk, which is provided with the full version, does this automatically.

How often should I rebuild, compact, and verify the database?

It is recommended that you rebuild and compact the database once a week or anytime a serious database error has occurred. Note: It strongly recommended that you backup all data before performing this procedure.

How do I print my letters?

The Late Letters and Mailings function in the Main menu provides the ability to generate a variety of correspondence to your tenants. In addition, the “Letters” button on the “View/Edit Tenant” screens allows you to print specific letters for individual tenants.

How do I make changes to the letters?

We will customize the generic letters included in the program for you at no charge for the first 60 days from the date of purchase. Custom letters and reports can be created using “Crystal Reports”. If you choose, Sentinel can do this for you at the prevailing hourly rate.

Keypad Programming.
  1. Unit Number/Passcode keypad display should read “Enter Unit No.00000”, Passcode only keypad display should read “Enter Code: 000000000”. Press 1 4 7 * to get to programming mode. (or just * for older firmware)
  2. Keypad display should now read “Enter Sec Code”. Enter your security code and #. (if known, or just # if there is no security code set. If the security code is not known, press # 1, then subtract the number displayed from 9999. The result is the security code that needs to be entered.
  3. Keypad display should now read “Select Function”Set OptionsSet DefaultsPress 1 to enter into Set Options.
  4. Keypad display should now read “Keypad Addr: 000/000”. Enter the address of the keypad and #. (In most cases, the main entry keypad is 0 and the exit will be 1, further keypads would addressed accordingly…0,1, 2, 3…etc.)
  5. Keypad display should now read “Relay #1 on-time 000/000”. Press 2 # to set relay number one at two seconds.
  6. Keypad display should now read “Relay #2 on-time 000/000”. Press 2 # to set relay number two at two seconds.
  7. Keypad display should now read “Passcode 0000/0000”. Press the four digit security code that you would like to set on the keypad. If you do not want a security code on the keypad, just press # to leave the settings at 0000.
  8. Keypad display should now read “Language 00/00”. Press # to leave the settings at 00, which is English. (this option will not be available on older firmware)
  9. Keypad display should read “Enter Unit No. 00000” or “Enter Code: 000000000”
  10. Restart the communications on the Sentinel software at the computer.
  11. Enter a valid code at the keypad to test for Access Granted, and to make sure that the gate is being activated.


Please call Sentinel Systems at 1-800-456-9955 if you still get “Access Denied” or if you are getting “Access Granted” but the gate is not opening.

I would like to have access to passcodes for the police, fire department, and my employees but they don't have unites.

Winsen allows you the flexibility to create “Access Control Only” units to provide access for your employees and emergency personnel without affecting the occupancy statistics.

Self Storage Management Software

As small operators in the self-storage industry, you're not just battling everyday business challenges; you're up against an industry undergoing seismic shifts. Consolidation is leaving operators like you with fewer choices, escalating costs, and stagnant technology. The Sentinel Systems software was created as your lifeline.
Learn More
Stay up to date on the latest features and releases by joining our newsletter.
Subscribe
By subscribing, you agree to our Privacy Policy and consent to receive updates from our company.
Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
© 2026 Sentinel Systems. All rights reserved.
Designed by:
Lab Coat Marketing