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4.6 Back-light Cutoff (1817 Only)
1. The back-light cutoff potentiometer is located on the LCD control board in the 1817
system only. This adjustment is not available in the 1815 system. This potentiometer
adjusts the intensity of the back lighted LCD panels and is normally factory set. To
increase the back-light, turn the potentiometer clockwise. To decrease the back-light,
turn the potentiometer counter clockwise.
4.7 Master Code Switch
1. The master code switch is left in the off position for normal operation. Turn the master
code switch on when setting the system master code. See programming instructions to
set the system master code. If the master code switch is turned on and a new master
code is not entered, the system will sound a long tone after approximately 30 seconds.
This tone will continue every 30 seconds until a new master code is entered, or until the
switch is turned off.
4.8 Ring Pin
1. The ring pin is labeled RING on the control board. This shorting pin must be installed to
allow the system to answer any calls placed to it. If remote programming or remote relay
operation is to be used, the shorting pin must be installed. Removing the shorting pin will
cause the system to never answer any call placed to it.
4.9 Relay 2 Contact Pin
1. This shorting pin sets the contacts on relay number two to be set to either Normally Open
(NO) or Normally Closed (NC). The pin is set to NO from the factory.
4.10 Auto – 1816 Pin
1. This shorting pin sets the system to operate as a stand-alone unit (AUTO), or to interface
with the 1816 Telephone Intercom System. The pin is set to AUTO from the factory.
4.11 HF – HS Pin
1. This shorting pin is located in the lower left hand corner of the circuit board. For Hands
Free (HF) operation, the shorting pin is placed on the HF pins. For a system with a Hand
Set (HS), the shorting pin is placed on the HS pins. The pin is set to HF from the
factory.
4.12 Security Level Pin
1. When the SEC LEVEL pin is in place, the circuit board has full feature capability. This
includes relay hold times, security levels, and elevator control functions. When the SEC
LEVEL pin is removed, the circuit board will act the same as a REV C board.
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