York Millennium YCAS 216X, Installation Operation & Maintenance

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YORK INTERNATIONAL
PROBLEM CAUSE SOLUTION
LOW COMPRESSOR OIL 1. Low oil charge. 1. Oil level should be
LEVEL visible in either sight
glass at all times. Add
YORK “E” (R-22) oil if
necessary.
“HIGH OIL DIFFERENTIAL 1. Oil filter is dirty. 1. Change oil filter.
PRESSURE” FAULT
2. Faulty oil or discharge 2. Check / replace
pressure transducers or transducers or repair
wiring. wiring.
“HIGH AMBIENT TEMP” 1. High ambient cut-out 1. Re-program cut-out.
FAULT is set too low.
Auto restart will occur after 2. Temperature sensed 2. Verify displayed ambient
a drop in temperature. incorrectly by thermistor. temp. is or - 15°F
of a thermometer placed
next to the OAT sensor.
3. Fans rotating backwards. 3. Air flow from forward fans
must be up. Correct fan
rotation.
4. Air flow to unit restricted 4. Check recommended
or is being recirculated. installation clearances.
“LOW AMBIENT TEMP” 1. Temperature of outside air 1. No problem exists.
FAULT is below cut-out.
Cut-out = 25°F for standard 2. Temperature sensed 2. Verify displayed ambient
ambient operation. incorrectly by thermistor. temperature is or -
15°F of a thermometer
A Low Ambient Kit must be placed next to the
be installed for operation OAT sensor.
below 25°F.
3. Low ambient cut-out set 3. Adjust as necessary.
too high.