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62-11637
7–20
00038
CHECK HIGH SPEED RPM
• ACTIVATION: The control system is calling for high speed operation, and engine speed is less than 1650
rpm, or greater than 1950 rpm for more than 60 seconds (120 seconds when the control system calls for a
change from low to high speed, or when unit first starts).
• UNIT CONTROL: Alarm only.
• RESET CONDITION: Auto reset if control system is calling for high speed operation and the speed is
within 1670 and 1930 rpm for 60 seconds or alarm may be manually reset using the display mounted keys
or by turning the unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (refer to reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1.
Force High Speed Operation
Place unit in continuous run, adjust setpoint above 11°F (-12°C) and set the Air Flow Functional
Parameter to HIGH. (Reset following testing.) System should run in high speed. (If not, check speed
overrides,
.) Ensure System is calling for high speed when performing steps 3 & 4.
2.
Check Engine Speed
a. Check actual engine speed using hand held tachometer. Refer to
range shown above.
b. Compare actual speed with that shown in Unit Data. Readings must be within ± 50 rpm.
3.
Check Fuel/Speed Actuator (FSA)
Check FSA plunger. Must move in and out freely. Refer to engine manual.
4.
Check Engine Air-Intake System
a. Check air cleaner indicator. Flag must not be visible.
b. Inspect air intake system. Verify hoses & tubes in good condition, with no kinks or restrictions.
5.
Check Engine Exhaust System
Inspect the exhaust system. Must be clear and unobstructed.
Содержание Transicold X4 7300
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