YORK INTERNATIONAL
33
FORM 160.49-O1
a. Clean air passages and windings per manufac-
turers instructions.
b. Meg motor windings – See Fig. 23 for details.
c. Re-lubricate ball bearings.
4. Inspect and service electrical components as nec-
essary.
5. Perform chemical analysis of system.
NEED FOR MAINTENANCE OR SERVICE
If the system is malfunctioning in any manner or the
unit is stopped by one of the safety controls, consult
the “Operation Analysis Chart”, pages 44 through 45
of this instruction. After consulting this chart, if you
are unable to make the proper repairs or adjustments
to start the compressor or the particular trouble con-
tinues to hinder the performance of the unit, please
call the nearest YORK District Office. Failure to report
constant troubles could damage the unit and increase
the cost of repairs considerably.
NORMAL AND SAFETY SYSTEM SHUTDOWNS
Normal and safety system shutdowns have been built
into the CodePak to protect it from damage during cer-
tain operating conditions. Therefore, it should be un-
derstood that at certain pressures and temperatures
the system will be stopped automatically by controls
that respond to high temperatures, low temperatures,
and low and high pressures, etc. Table 1 is an explana-
tion of each specific shutdown. If the CodePak shuts
down on a “Safety” shutdown, the display will read
SYSTEM SHUTDOWN – PRESS STATUS
Upon pressing the STATUS key, the day-of-week, time-
of-day and cause of shutdown is displayed. Safety shut-
downs require the operator to manually reset the Con-
trol Center prior to restarting the CodePak. When the
display reads
START SEQUENCE INITIATED
, the cause of
the safety shutdown is automatically cleared from the
memory.
SAFETY SHUTDOWNS
• Power Failure (If auto restart programming jumper is
not installed on the Micro Board)
• Low Evaporator Pressure
• Low Oil Pressure
• High Condenser Pressure
• Evaporator Transducer or Probe Error
• High Discharge Temp
• High Oil Temp
• Oil Pressure Transducer
• Starter Malfunction Detected
• Faulty Discharge Temp Sensor
• Aux. Safety Shutdown
• Motor Phase Current Unbalance (Solid State Starter
Unit only)
If the CodePak shuts down on a “Cycling” shutdown
the display will read
SYSTEM SHUTDOWN – PRESS STATUS
.
Upon pressing the STATUS key, the day-of-week, time-
of-day and cause of shutdown are displayed. These
shutdowns do not require the operator to manually re-
set the Control Center prior to re-starting the CodePak.
The CodePak will automatically restart when the cy-
cling condition is removed.
CYCLING SHUTDOWNS
• Power Failure (If auto re-start programming jumper
is installed on the Micro Board)
• Low Water Temp
• Flow Switch
• System Cycling
• Multi-Unit Cycling
• Internal Clock
• Anti-Recycle
• Motor Controller (Manual reset of the CM-2 module
on E-M starter units; the logic board of the Solid
State Starter may be required)
• Power Fault
• Program Initiated Reset
• Low Oil Temp
• AC Undervoltage
• Low Line Voltage (Solid State Starter units only)
• High Line Voltage (So2lid State Starter units only)
• Low Oil Temp. Differential
STOPPING THE SYSTEM (See Fig. 3, page 5)
The CodePak MicroComputer Control Center can be
programmed to start and stop automatically (maximum,
once each day) whenever desired. Refer to “Section 2”.
To stop the CodePak, proceed as follows:
1. Push the COMPRESSOR STOP/RESET switch. The
Control Center display will show
SYSTEM COASTDOWN
for 150 seconds, (6 min. if
Micro Board Jumper JP4 removed). The compres-
sor, condenser water, and cooling tower fans will
stop automatically. The oil pump will continue to run
for a period of 150 seconds. The oil pump will then
stop automatically. Once stopped, the
SYSTEM COASTDOWN
display will be replaced by
SYSTEM READY TO START
.
