S9200U1000 UNIVERSAL HOT SURFACE IGNITION INTEGRATED FURNACE CONTROL
23 69-2075—01
Test Mode
The S9200U1000 is equipped with a Test Mode feature
which allows the control to test and verify several critical
parameters. During Test Mode, the S9200U1000 alters
the selected Safety Timings as described in Table 14.
Test Mode can be accessed several ways:
— Thermostat inputs:
• Apply a Y + G request within 3 seconds after
power-up for 2 seconds.
• Next, remove the Y + G request and apply W
request within 10 seconds.
— EnviraCOM™ command
— The G signal enables the circulator in Test Mode.
If a G request is present, the circulator is con-
trolled as required by the heating or cooling
sequence. If the G request is removed, the circu-
lator turns off during the heating or cooling
sequence. If there is no other thermostat request
present, a G request causes the circulator to be
energized. The circulator will energize during a
heating cycle if the limit switch opens, regardless
of the G signal.
If there is a failure during Test Mode:
• An error code flashes indicating the failure. See
Table 11 on page 20.
• An EnviraCOM™ alarm is active and sent on
the bus. See Table 13 on page 22.
Test Mode is exited after any of the following conditions:
— Three minutes of operation
— Receipt of an EnviraCOM™ command instructing
the S9200U1000 to exit Test Mode
— The cycling of power
Reversed line polarity 33 Display/Diagnostics/EnviraLNK®/TAM
Earth ground problem 88 Display/Diagnostics/EnviraLNK®/TAM
A manual reset is required due to Rollout Limit 87 Display/Diagnostics/EnviraLNK®/TAM
A manual reset is required due to gas valve welded condition being detected more times
than allowed maximum
124 Display/Diagnostics/EnviraLNK®/TAM
Flame current caution level while running 4 Display/Diagnostics
Table 13. S9200U1000 EnviraCOM™ Alarms. (Continued)
Alarm Description
Alarm
Number Comment
Table 14. Test Mode Parameters.
Test Mode Parameter Modified Timing
Pre-Purge 5 seconds
HSI Warm-up 17 seconds
Ignition Activation 3 seconds
Flame Recognition 1 second
Trial for Ignition 4 seconds
Heat Fan ON Delay 15 seconds
Heat Fan OFF Delay 0 seconds
Post-Purge 5 seconds
Cool Fan ON Delay 2 seconds
Cool Fan OFF Delay 0 seconds
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