JOHNSON CONTROLS
204
FORM 150.67-NM1
ISSUE DATE: 4/28/2017
SECTION 9 – SERVICE AND TROUBLESHOOTING
Pressingthe↑(UP)arrowkeywillenergizetheliquid
line solenoid valve and OFF will change to ON in the
display as the LLSV is energized. Energizing and de-en-
ergizing outputs may be useful during troubleshooting.
SERVICE MODE – CHILLER CONFIGURATION
After the Outputs are displayed, the next group of dis-
plays relate to chiller 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 chiller configuration.
Soft start (disabled), Refrigerant Type
(R410A), and Expansion Valve Type
(Thermostatic), and North American
Feature (Enabled) MUST be properly
programmed or damage to compres-
sors 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-
uescanalsobechangedusingthe↑(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.
SERVICE MODE – ANALOG AND DIGITAL
INPUTS
After entering Service Mode (press PROGRAM ↑↑
↓↓ ENTER), all digital and analog inputs to the mi-
croboard can be viewed by pressing the OPER DATA
key.Afterpressing the OPERDATA 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
willappearwhensequencedwiththe↓(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 temperature 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 P R J 7 - 1 0
2 . 1 V D C = 8 1 P S I G
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