FORM 201.23-CL1 (309)
JOHNSON CONTROLS
7
PanEL CHECkS
(POWER On – BOtH SYStEm SWItCHES “OFF”)
You are about to turn power on to this
machine. Safety is Number One! Only
qualified individuals are permitted to
service this product. The qualified
individual furthermore is to be knowl-
edgeable of, and adhere to, all safe
work practices as required by NEC,
OSHA, and NFPA 70E. Proper per-
sonal protection is to be utilized where
and when required.
1. Assure the chiller OFF/ON UNIT switch at the
bottom of the keypad is OFF.
2. Apply 3-phase power to the chiller. Turn ON the
optional panel circuit breaker if supplied. The
customer’s disconnection devices can now be set
to ON.
3. Verify the control panel display is illuminated.
4. To prevent the compressors from starting, assure
that the system switches under the SYSTEM
SWITCHES key are in the OFF position.
5. Verify that the voltage supply corresponds to the
unit requirement and is within the limits given in
the Technical Data Section of IOM.
6. Ensure the heaters on each compressor are on us-
ing a clamp-on ammeter. Heater current draw is
approx. 3A.
7. Verify the “Factory Set” Overload Potentiometers
on the VSD Logic Board are set correctly. Press the
VSD DATA key and using the arrow keys, scroll to
the compressor overload settings. Verify the “Fac-
tory Set” overload potentiometer(s) on the VSD
logic board are set correctly. In the unlikely event
that they are not set correctly, adjust the potenti-
ometers until the desired values are achieved.
The VSD is powered up and live. High
voltage exists in the area of the cir-
cuit board on the bus bars, VSD Pole
Assemblies, and wiring to the input
inductor.
Adjust the potentiometers, if needed, using the table
in IOM. The potentiometers are Sys 1=R19, Sys
2=R64, Sys 3=R42, and Sys 4=R86.
Incorrect settings of the potentiometers
may cause damage to the equipment.
Record the Overload Potentiometer settings below:
Compressor Overload Setting:
System 1 = ______________ Amps
System 2 = ______________ Amps
System 3 = ______________ Amps
System 4 = ______________ Amps
8. Press the STATUS Key. If the following message
appears, immediately contact YORK Product
Technical Support. The appearance of this message
may mean the chiller has lost important factory
programmed information. The serial num-
ber and other important data may need to be
reprogrammed.
Changing the programming of this
feature requires the date and time to
be set on the chiller prior to program-
ming. Additional information regard-
ing this message and how to enter the
serial number with the factory provided
IOM.
UnIt WaRnIng: InVaLID SERIaL nUmBER
EntER UnIt SERIaL nUmBER