JOHNSON CONTROLS
128
FORM 150.62-NM8 (1020)
SERVICE AND TROUBLESHOOTING
Soft start, Refrigerant Type, and Ex
-
pansion Valve Type MUST be properly
programmed or damage to compres
-
sors and other system components
may result.
Following is a list, in order of appearance:
DATA LOGGING MODE = : DO NOT MODIFY
DATA LOGGING TIMER = : DO NOT MODIFY
SOFT START
REFRIGERANT TYPE
EXPANSION VALVE TYPE
SYS 1 HOURS
SYS 2 HOURS
SYS 1 STARTS
SYS 2 STARTS
The last displays shown on the above list is for the
accumulated run and start timers for each system. All
values can also be changed using the
↑ (UP) and ↓ (DOWN)
arrow keys, but under normal circumstances would not
be advised. After the last start display, the microprocessor
will display the first programmable value under the
PROGRAM key.
Service Mode – Inputs
After entering Service Mode (program UP arrow, UP
arrow
↑↑
then DOWN arrow, DOWN arrow
↓↓)
, all
digital and analog inputs to the I/O Board 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*** COOLER INLET REFRIG. TEMP.
•
SYS 2*** COOLER INLET REFRIG. TEMP.
•
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 suction pressure transducer is optional on YCAL0014 through
YCAL0060. A low pressure switch is standard on these models in
place of the suction transducer.
** The discharge pressure transducer is optional on some models.
*** The cooler inlet refrigerant temp. sensor is on R-407C units
only.
****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:
This example indicates that the system 1 suction
pressure 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:
This indicates that the flow switch/remote start input is
connected to plug 13 - pin 5 (J13-5) on the I/O Board,
and is ON (ON = +30VDC unregulated input, OFF =
0VDC input on digital inputs).
S Y S 1 S U C T P R J 7 - 1 0
2 . 1 V D C = 8 1 P S I G
F L O W S W / R E M S T A R T
J 1 3 - 5 I S O
N
Summary of Contents for YCAL0014E Series
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