Section 9 - Service And Troubleshooting; Clearing History Buffers; Service Mode; Service Mode - Outputs - York YCAL Series Installation Operation & Maintenance

FORM 150.66-NM3
ISSUE DATE: 09/25/2020

SECTION 9 - SERVICE AND TROUBLESHOOTING

CLEARING HISTORY BUFFERS

The history buffers may be cleared by pressing the HIS-
TORY key and then repeatedly pressing the UP arrow
key until you scroll past the last history buffer choice.
The following message will be displayed:
I N I T I A L I Z E
I
E N T E R
Pressing the ENTER/ADV key at this display will
cause the history buffers to be cleared. Pressing any
other key will cancel the operation.
DO NOT CLEAR BUFFERS. Impor-
tant information may be lost. Contact
factory service.

SERVICE MODE

Service Mode is a mode that allows the user to enable
or disable all of the outputs (except compressors) on
the unit, change chiller configuration setup parameters
and view all the inputs to the microboard.
To enter Service Mode, turn the Unit Switch off and
press the following keys in the sequence shown; PRO-
GRAM, UP ARROW, UP ARROW, DOWN ARROW,
DOWN ARROW, ENTER. Service Mode will time out
after 30 minutes and return to normal control mode, if
the panel is accidentally left in this mode. Otherwise,
turning the unit switch on will take the panel out of
Service Mode.
SERVICE MODE – OUTPUTS
After pressing the key sequence as described, the con-
trol will enter Service Mode permitting the outputs
(except compressors), operating hours, refrigerant
type, expansion valve type, and start/hour counters to
be viewed/modified. The ENTER/ADV key is used to
advance through the outputs. Using the ↑ and ↓ (UP/
DOWN) arrow keys will turn the respective digital out-
put on/off or modify the value.
JOHNSON CONTROLS
H I S T O R Y
= Y E S
Following is the order of outputs that will appear as the
ENTER/ADV key is pressed:
SYS 1 COMP 1 STATUS TB7-2 IS:
SYS 1 LLSV STATUS TB7-3 IS:
SYS 1 COMP 2 STATUS TB7-4 IS:
SYS 1 COMP 3 STATUS TB7-5 IS:
SYS 1 HGBP STATUS TB7-7 IS:
SYS 2 COMP 1 STATUS TB10-2 IS:
SYS 2 LLSV STATUS TB10-3 IS:
SYS 2 COMP 2 STATUS TB10-4 IS:
SYS 2 COMP 3 STATUS TB10-5 IS:
SYS 1 FAN OUTPUT 1 TB7-8 IS:
SYS 1 FAN OUTPUT 2 TB7-9 IS:
SYS 1 FAN OUTPUT 3 TB7-10 IS:
SYS 2 FAN OUTPUT 1 TB10-8 IS:
SYS 2 FAN OUTPUT 2 TB10-9 IS:
SYS 2 FAN OUTPUT 3 TB10-10 IS:
EVAP HEATER STATUS TB8-2 IS:
SYS 1 ALARM STATUS TB8-3 IS:
SYS 2 ALARM STATUS TB9-2 IS:
EVAP PUMP STATUS TB8-6&7 IS:
Each display will also show the output connection on
the microboard for the respective output status shown.
For example:
S Y S 1 L L S V
T B 7 - 3
This display indicates that the system 1 liquid line sole-
noid valve is OFF, and the output connection from the
I/O board is coming from terminal block 7 - pin 3.
Pressing the ↑ (UP) arrow key will energize the liquid
line solenoid valve and "OFF" will change to "ON" in
the display as the LLSV is energized. Energizing and
de-energizing outputs may be useful during trouble-
shooting.
SERVICE MODE – CHILLER CONFIGURATION
After the Outputs are displayed, the next group of
displays relate to chiller configuration and start/hour
counters. Data logging, soft start, refrigerant type, and
expansion valve type all must be programmed to match
actual chiller configuration.
S T A T U S
I S O F F
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