20 YORK INTERNATIONAL
MEANING OF THE “F” DISPLAY
Any time an “F” appears on the display, the compressor
will be shut down on a safety control. At this time the
operator should turn the “SELECT DATA DISPLAY” ro-
tary switches to the number “18”. When this is done a
Fault Code (0-11) will appear which can be compared to
the “FAULT Code” list on the control panel to determine
the reason for system failure. A list of the fault codes
and their respective code number is shown below.
FIG. 14 – FAULT CODES
An “F” Code overrides any other letter code display which
may appear. See the “MANUAL RESET FAULTS” and
“AUTOMATIC RESET FAULTS”. Section for a more
detailed explanation of the fault codes. (Pages 21 & 22).
When a FAULT occurs, the micro will shut the unit down.
Auto-restart is determined by the type of fault plus the
number of times the fault has occurred in the last 90
min. Details of auto-restart will follow.
At the time of the Fault which caused the “F” code to be
displayed, the microprocessor stores operating data on
the system at the instant of shutdown. Any display se-
lected by the operator will show stored data. This data
will remain in storage until the SYSTEM On/Off Switch
is placed in the OFF position. This clears the micro-
processor’s memory of stored data, and any display at
this time will be of current system conditions. It also al-
lows the compressor to start.
Before placing the SYSTEM On/Off Switch to the OFF
position, the operator may (via the “SELECT DATA DIS-
PLAY” rotary switches) select the parameter which
caused the fault, and any other related system function,
and view their magnitudes at the time of the failure. This
can provide valuable troubleshooting information. De-
tailed explanations of all system safeties will follow in
this section.
FAULT CODES AND SYSTEM SAFETIES
SINGLE CIRCUIT UNITS
Code Description
Number of Fault.
0. No Fault
1. Micro detected low/hi motor current
or
External hi pressure cutout
or
External motor overload
2. Low Oil Pressure, PSID (kPaD x 10)
3. Low suction pressure, PSIG (kPaG x 10)
4. Micro detected high pressure cutout
5. Spare
6. Spare
7. Spare
8. Spare
9. High ambient temperature
10. Low ambient temperature
11. Low water temperature
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LD01853
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