Section 4 – SR-2 Operation
The LOCK ON key energizes the device for 15 minutes. Not all tests can be locked on. Here the Heat Output
has been locked on. Comparing the AMPS display with the previous display where the device was not energized,
it can be seen that the pilot solenoid is drawing about 0.3 amps.
OFF
ON
HEAT OUTPUT
EXIT LOCK ONTEMP ON
HEAD-P AMPS
SCT-P VOLTS
169
169
0.3
13.4
NEXT
A countdown counter shows the time remaining for the test. If the test times out Alarm Code 54 Test Mode
Timeout is set.
The UNLOCK key unlocks the display and returns to the Interface Board Test.
Interface Board Test Modes and Current Draw
Interface Board Test
Approximate Device
Current Draw
Preheat Relay 70 Amps Temporary On only
Buzzer Negligible Temporary On only
Run Relay 1.5 Amps
Heat Output 0.4 Amps
Damper Output 6 Amps
Indicator Light 0.1 Amps
Alarm Light 0.1 Amps
Diesel/Electric Relay 1.1 Amps Not available if ER is
high
High Speed Relay 4.6 Amps
Hot Gas Bypass 1.1 Amps ETV units only.
4-72
31 January 2005
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