Bulletin 100-50-6.2 –
Page 3
• the drip cycle will be running (parameter d7)
• the heating of the freezing fluid will be running (parameter dA)
LED evaporator fan
if lit, the evaporator fan will be turned on
if flashing, after the drip cycle evaporator fan delay will be
running (parameter F3)
LED alarm
if lit, an alarm will be running
°C °C LED
if lit, the unit of measure of the temperatures will be degree
Celsius (parameter P2)
°F °F LED
if lit, the unit of measure of the temperatures will be degree
Fahrenheit (parameter P2)
CODE EXPLANATION
Loc the keyboard and/or the working setpoint are locked
(parameter r3); also look at paragraph 2.5
5 ALARMS
5.1 Alarms
CODE MEANING
AL Low temperature alarm (parameters A0, A1 and A2)
AH High temperature alarm (parameters A3, A4 and A5)
id Door switch input alarm (parameters i0 and i1)
iA Multipurpose input alarm (parameters i0, i1 and i5)
iSd Controller locked alarm (parameters i0, i1, i5, i7, i8 and i9)
COH Overheated condenser alarm (parameter C6)
CSd Compressor locked alarm (parameter C7)
When the cause of the alarm disappears, the controller restores to
normal operation, except for the controller locked alarm (code “
iSd”)
and the compressor locked alarm (code “
CSd”). These alarms can
only be reset by switching the power supply to the controller off/on.
6 INTERNAL DIAGNOSTICS
6.1 Internal diagnostics
CODE EXPLANATION
Pr1 Cabinet probe error (parameter P0)
Pr2 Evaporator probe error (parameter P0)
Parameters
Minimum
Maximum U.M.
dEF.
Working Setpoints
SP
r1
r2
°C/°F
0.0
working setpoints
Parameters
Minimum
Maximum U.M.
dEF.
Temperature Inputs
CA1
-25.0
25.0
°C/°F
0.0
cabinet probe offset
CA2
-25.0
25.0
°C/°F
0.0
evaporator probe offset
P0
0
1
—
1
kind of probe
0 = PTC
1 = NTC
P1
0
1
—
1
display decimal point value during norman operation (Celsius mode only)
1 = YES
P2
0
1
—
0
unit of measure, temperature
0 = °C
1 = °F
When the cause that initiated the alarm is corrected, the controller
returns to normal operation.
7 TECHNICAL DATA
7.1 Technical data
Frontal bezel protection: IP 65.
Connections (use copper conductors only): screw terminal blocks
(power supply, inputs and outputs) on PSK203; extractable terminal
blocks on PSK223 and PSK233.
Working temperature: from 0 to 55°C (32 to 131°F) 10 to 90% of rela-
tive humidity without condensate).
Power supply: 115 VAC/230 VAC, 50/60 Hz, 3 VA (approximate).
Insulation class: 2.
Alarm buzzer: present on PSK223 and PSK233.
Measure inputs: 2 (cabinet probe and evaporator probe) for PTC/
NTC probes.
Digital inputs (only PSK223 and PSK233):
1 (multipurpose/door switch) for NO/NC contact (5V, 1 mA).
Working range: from -50.0 to 150.0°C (-50 to 300°F) for PTC probe,
from -40.0 to 105.0°C (-40 to 220°F) for NTC probe.
Resolution: 0.1°C/1°C/1°F.
Digital outputs - 3 relays:
• compressor relay: 16 res. A @ 250 VAC, 5 FLA, 30 LRA (NO contact)
in PSK203; 30 res. A @ 250 VAC, 12 FLA, 72 LRA (NO contact) in
PSK233; 8 res. A @ 250 VAC, 2 FLA, 12 LRA otherwise
• defrost relay: 8 res. A @ 250 VAC, 2 FLA, 12 LRA (change-over contact)
• evaporator fan relay: 8 res. A @ 250 VAC, 2 FLA, 12 LRA (NO
contact) in PSK203; 5 res. A @ 250 VAC otherwise.
The maximum current allowed on the load is 10 A.
Serial port: port for communication with a management system
(through a serial interface, via TTL, with MODBUS communication
protocol) or with the programming key; not available in PSK203.
8 CONFIGURATION PARAMETERS
8.1 Configuration parameters
