Performance Tests
Service Manual 7-3
7.5 Performance Tests
Note:
A test data sheet that can be used to record test results is provided on page C-2.
7.5.1 Power-On Test
Use the power-on test to confirm basic functionality of the unit.
To perform the power-on test:
1. Plug the warming unit’s power cord into the outlet, and press the On/Standby
key.
2. Verify that the unit passes its power-on self-test (POST) and enters Ready mode:
• The status LED turns green, and the display turns on.
• A short tone sounds, indicating a successful POST. If POST is unsuccessful, an
alarm screen appears (see Alarms on page 6-12).
• The Main screen appears (Figure 7-2). Note that if the filter needs to be
replaced, the Replace Filter screen appears instead of the Main screen
(Figure 7-3). If you see the Replace Filter screen, press the OK key to proceed
to the Main screen. (The filter must be replaced before placing the unit back
in operation. Refer to Filter Replacement on page 5-4.)
Power-On Test Page 7-3
Keypad Test Page 7-5
Display Test Page 7-7
Temperature Accuracy Test Page 7-8
Flow Test Page 7-10
Thermostat Test Page 7-11
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