Service Mode - Chiller Configuration; Service Mode - Analog And Digital Inputs - York YLAA Series Installation Operation & Maintenance

SECTION 9 – SERVICE AND TROUBLESHOOTING
S Y S 1 L L S V
T B 10 - 3
This display indicates that the system 1 liquid line sole-
noid valve is OFF, and the output connection from the
microboard is coming from terminal block 10 – 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 troubleshoot-
ing.
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,
pump control selection and expansion valve type all
must be programmed to match actual chiller configura-
tion.
Soft start (disabled), Refrigerant Type
(R-410A), and Expansion Valve Type
(Thermostatic), and North American
Feature (Enabled) MUST be properly
programmed or damage to compressors
and other system components may result
Following is a list of chiller configuration selections, in
order of appearance:
DATA LOGGING MODE = : DO NOT MODIFY
DATA LOGGING TIMER = : DO NOT MODIFY
SOFT START
REFRIGERANT TYPE
EXPANSION VALVE TYPE
REMOTE TEMP RESET OPTION
REMOTE INPUT SERVICE TIME
FEATURE SET
PUMP CONTROL SELECTION
SYS 1 HOURS
SYS 2 HOURS
SYS 1 STARTS
SYS 2 STARTS
The last displays shown on the above list are for the ac-
cumulated run and start timers for each system. All val-
ues can also be changed using the ↑ (UP) and ↓ (Down)
arrow keys, but under normal circumstances would not
be required or advised. After the last start display, the
microprocessor will display the first programmable
value under the PROGRAM key.
162
S T A T U S
I S O F F
SERVICE MODE – ANALOG AND DIGITAL
INPUTS
After entering Service Mode (PROGRAM ↑↑ ↓↓),
all digital and analog inputs to the microboard can be
viewed by pressing the OPER DATA key. After press-
ing the OPER DATA key, the ↑ (UP) arrow and ↓
(DOWN) arrow keys are used to scroll through the
analog and digital inputs.
Following is the order of analog and digital inputs that
will appear when sequenced with the ↓ (Down) arrow
key:
(analog inputs)
SYS 1 SUCT PRESSURE
UNIT TYPE
SYS 1 *DISCH PRESSURE
SYS 1** SUCTION TEMP.
SYS 2** SUCTION TEMP.
AMBIENT AIR TEMP.
LEAVING LIQUID TEMP.
RETURN LIQUID TEMP.
SYS 2 SUCTION PRESSURE
SYS 2 SPARE
SYS 2 *DISCH PRESSURE
SYS 1 MTR VOLTS
SYS 2 MTR VOLTS
(digital inputs)
PWM TEMP RESET INPUT
LOAD LIMIT INPUT
FLOW SW / REM START
SPARE
SINGLE SYSTEM SELECT
SYS 1 MP / HPCO INPUT
SYS 2 MP / HPCO INPUT
* The discharge pressure transducer is optional on some models.
** The suction temp. sensor is on EEV units only.
The analog inputs will display the input connection,
the temperature or pressure, and corresponding input
voltage such as:
S Y S 1 S U C T
2 . 1 V D C
This example indicates that the system 1 suction pres-
sure input is connected to plug 7 – pin 10 (J7-10) on the
I/O board. It indicates that the voltage is 2.1VDC which
corresponds to 81 PSIG (5.6 bars) suction pressure.
The digital inputs will display the input connection and
ON/OFF status such as:
FORM 150.72-ICOM6
ISSUE DATE: 12/29/2017
P R J 7 - 1 0
= 8 1 P S I G
JOHNSON CONTROLS