Specifications

15
Definition of On-Board Symbols
STATUS, DEFAULT AND READING DISPLAY
When the on-board green light is on, the compressor relay is energized. When the green light is blinking, the room
temperature sensor is satisfied, but waiting for the minimum off time or minimum run time to time out. When the red
light is on, there is a critical alarm. When the amber light is on, there is a non-critical alarm.
The status and the digital data are displayed on the onboard four-digit LED display. Below is a list of the
parameters of the operational status.
On-board Four-Digit On-board Four-Digit
Display Description Display Description
STUP Indicates the status of Start Up Mode CKFH Indicates all sensors are OK
CKFN Check fan working status FNDL Indicates FAN DELAY MODE
CKP1 Check pressure transducer FDTP Actual TS1 value in FAN DELAY
OKP1 Indicates the pressure transducer is working COOL Indicates COOL MODE
CKT1 Check sensor TS1, the suction/fan cut-in sensor OFF Indicates OFF MODE
OKT1 Indicates the TS1 is working as it should PMDN Indicates PUMPDOWN MODE
CKT2 Check sensor TS2, the room temp sensor DEFR Indicates DEFROST MODE
OKT2 Indicates the TS2 is working DRAN Indicates COIL DRAIN MODE
CKT3 Check sensor TS3, the coil temp sensor DFTP Inlet Sensor TS3 value in DEFROST MODE
OKT3 Indicates the TS3 is working LAG Standby controller of Lead/Lag C
A list of the parameters that can be displayed and/or changed is shown below when access to the default settings is
needed. This access is usually done by a trained technician.
VARIABLES
“VARI”
Description
RMTP Room Temperature D1ST DIGITAL Input 1 Status
SUPH Superheat D2ST DIGITAL Input 2 Status
PRES Suction Pressure Reading D3ST DIGITAL Input 3 Status
TSUC Suction Temperature Reading IPQ1 1
ST
Quadrant of IP Address
TSAT Saturated Temperature IPQ2 2
nd
Quadrant of IP Address
TCOI Coil Temperature IPQ3 3
rd
Quadrant of IP Address
VALV Expansion Valve Position IPQ4 4
th
Quadrant of IP Address
STAT
Status REFR/OFF/DEFROST/DRAIN/FAN DELAY
NET1 1
ST
Quadrant of Subnet Mask
ALCM
ON
NET2 2
nd
Quadrant of Subnet Mask
RLDF
Defrost Relay ON/OFF
NET3 3
rd
Quadrant of Subnet Mask
RLFN
Fan Relay ON/OFF
NET4 4
th
Quadrant of Subnet Mask
ALAU
AUX Relay ON/OFF
FWRV Firmware Version V3.98
MANUAL MODES
“MNMD”
MCTL MANUAL STATUS
MVLV MANUAL VALVE
CLAL CLEAR ALARM
BOND BOND CONTROLLERS