Service Mode - Analog And Digital Inputs - York YLUA0078 Installation Operation & Maintenance

SECTION 9 – SERVICE AND TROUBLESHOOTING
SERVICE MODE – CONDENSING UNIT
CONFIGURATION
After the Outputs are displayed, the next group of dis-
plays relate to unit configuration and start/hour coun-
ters. Data logging, soft start, refrigerant type, pump
control selection and expansion valve type all must be
programmed to match actual unit configuration.
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 unit configuration selections, in
order of appearance:
HOT GAS BYPASS TYPE
UNIT TYPE (Standard or Heat Pump)
COMPRESSOR HOURS
COMPRESSOR STARTS
DATA LOGGING TIMER X SECS
FAN CONTROL TYPE (Single)
SOFT START (disabled)
REFRIGERANT TYPE (R410A only)
EXPANSION VALVE TYPE (Thermostatic Only)
REMOTE TEMP RESET OPTION =
REMOTE INPUT SERVICE TIME =
"NORTH AMERICAN FEATURE SET ENABLED"
HYDRO PUMP SELECTION
EVAP PUMP TOTAL RUN HOURS
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
micro will display the first programmable value under
the PROGRAM key.
142
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
pressing 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 2.1 volts dc
which corresponds to 81 psig (5.6 bars) suction pres-
sure.
FORM 150.73-NM1
ISSUE DATE: 09/04/2020
P R J 7 - 1 0
= 8 1 P S I G
JOHNSON CONTROLS