Element
Operation and Maintenance
L-OMM-0003_A
• 10/8/2021 Technical Support • (800) 526-0288 • Mon-Fri, 8 am - 5 pm EST Page
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16.1.4 Self-Check/Control Failure
The PIM confirms the integrity of the gas valve relay contacts to insure safety. It also monitors
the processor memory and software execution for proper program flow. If the control detects an
error in its software or hardware, all outputs are turned off and the LED displays a steady ON
condition. If this condition persists after an attempt to restart then the control must be replaced.
16.1.5 System Safety Checks
The PIM monitors the safety switches, temperature sensors, supply voltage, and blower speed
and will go to soft lockout until the error condition is corrected. Individual LED diagnostic codes
or messages on the RS485 communicates problem information for efficient troubleshooting.
16.1.6 Flame Current Measurements
The PIM supports direct measurement of flame signal strength using the flame current test pins
(FC+, FC-) on connector P2. Flame current may be measured by a micro-ammeter, or
alternately by using a standard digital voltmeter. The signal on P2 is calibrated to 1 micro-
amp/volt, so flame current in micro-amps can be directly read on the volts scale.
The user interface displays an approximation of flame current up to 5 micro-amps
.
16.1.7 Non-Volatile Lockout/Manual Reset
The PIM normally allows for volatile ignition lockout where a lockout condition is reset by a loss
in 24VAC power or the call for heat demand. In certain applications or where required by
standards (such a CSD-1), it can be configured through the parameter settings for non-volatile
lockout after ignition failure. In this case the lockout may only be reset by the on-board manual
reset button, or the remote reset input.
16.1.8 ID Card
The PIM determines its operating parameters by reading the identification code of an external
plug-in ID card. The ID card is connected to the PIM at the J6 connector.
NOTE:
ID card must be present for the PIM and unit to operate. This card selects the proper
settings in the PIM's memory for various Lync LC-Q
models. The first time a PIM is powered
up attached to an ID card, the ID card setting is stored in non-volatile memory. Once set, the
PIM only operates with the correct ID card installed that matches its internal ID settings. The
PIM verifies the ID card at power-up and on each heating cycle.
16.1.9 Error Codes
Code
Description
0
No Error
Control Display Errors
1
EEPROM
2
Outdoor Sensor
3
Supply Sensor
4
DHW Sensor
5
Vent Limiting
6
FTBus Communication
