Carrier 39L User Manual
Page 106
Table 19 — Test of Output Signals
KEYBOARD
ENTRY
DISPLAY
RESPONSE
COMMENTS/ACTION
OUTPUTS
Field testing of outputs. (Set HOA switch to OFF.)
HCV %
Press ENTR if unit is equipped with a hot water or steam valve. Otherwise press
HCV TEST
Verify that the hot water or steam valve strokes to its 100% position.
CCV %
The hot water or steam valve returns to its 0% position. Press ENTR if unit is equipped with a chilled water
valve. Otherwise press
CCV TEST
Verify that the chilled water valve strokes to its 100% position.
MIXD %
The chilled water valve returns to its 0% position. Press ENTR if unit is equipped with mixed-air dampers.
Otherwise press
MIXD TEST
Verify that the outdoor-air damper strokes to its 100% position. Proceed with the applicable Constant Volume
or Variable Air Volume portion of the test.
For Constant Volume Units:
IGV %
If so equipped, verify that the outdoor-air damper returns to its 0% position. (Set the HOA switch
to AUTO.)
SF X
FAN TEST
Supply fan will be turned ON automatically. If unit is equipped with the Option Module, proceed with the
Option Output portion of the test (Table 20). If the unit does not have an Option Module, proceed to the electric
heater portion of the test (Table 21). If unit does not have an Option Module or electric heater, proceed as
follows:
EXIT TST
TST CMPL
Test is now complete. The unit is back under normal automatic control.
For Variable Air Volume Units:
IGV %
If so equipped, verify that the outdoor-air damper returns to its 0% position.
IGV TEST
Verify that the IGVs stroke to their 100% position. Close the door of the fan section. Turn the HOA switch
to AUTO.
SF X
The IGVs return to their 0% position.
FAN TEST
The supply fan is turned ON automatically.
HIR X
The supply fan stops.
HIR TEST
Using an ohmmeter across the HIR relay contacts (refer to component arrangement label for location), the
reading should be less than 10 ohms. If the unit is equipped with the option module, proceed with the option
output portion of the test (Table 20). If unit does not have an option module, proceed to the electric heater
portion of the test (Table 21). If unit does not have an option module or electric heater, proceed as follows:
EXIT TST
TST CMPL
Test is now complete. The unit is back under normal automatic control.
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