Tefcold BLC3 - Auxiliary Relay Configuration; Second Relay Management

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alarm signalling: the flashing message “dA” is displayed. If doA=nu the door alarm will be not
signalled.
dLc Stop count down of the running cycle with door open y = count down is stopped with door openi;
n= count down goes on with door open;
rrd Regulation restart with door open alarm: y = count down and regualtion restart when door open
alarm is signalled.; n = compressor and fans stay according to the odc parameter when door open
alarm is signalled.
d2F(EAL, bAL,) Second digital input configuration (26-27): EAL: external alarm; bAL: serious alarm,
regulation is stopped.;
d2P: Configurable digital input polarity (26-27): (OP÷CL)select if the digital input is activated by
opening or closing the contact. OP= opening; CL=closing
did Time delay for digital input alarm:(0÷255 min.) If d2F=EAL or bAL (external alarms), “did”
parameter defines the time delay between the detection and the successive signalling of the alarm.
AUXILIARY RELAY CONFIGURATION
oA1 First auxiliary relay configuration (7-8):
ALL: alarm; Lig: light; AuS: Second thermostat; tMr: auxiliary relay enabled by keyboard
C2: Second compressor: it always is switched on during the Cycles, during the holding depends on
the 2CH parameter
oA2 First auxiliary relay configuration (1-2):
ALL: alarm; Lig: light; AuS: Second thermostat; tMr: auxiliary relay enabled by keyboard
C2: Second compressor: it always is switched on during the Cycles, during the holding depends on
the 2CH parameter
oA3 First auxiliary relay configuration (9-10)
ALL: alarm; Lig: light; AuS: Second thermostat; tMr: auxiliary relay enabled by keyboard
C2: Second compressor: it always is switched on during the Cycles, during the holding depends on
the2CH parameter
SECOND RELAY MANAGEMENT
2CH Compressors setting during the holding phase: (used only if one OAi =C2)
The second compressor is always switched on during the phases, during the holding depends on this
parameter.
The 2CH sets which compressor is used during the holding phase.
Second compressor operates on set + OAS. (whit set= set loaded during the holding phase of each
cycle). It starts oAt min. after the first compressor
The following table shows how it works:
Holding
2CH =C1 C1 on;
2CH =C2 C2 on
2CH =1C2 C1 on; C2 On
OAt Second compressor switching on delay: (0÷255 min) time delay between the switching on of the
first and second compressor.
OAS Set point for second compressor (-50÷50; ris.1 °C/ 1°F) This set point is a differential add to the
set point of the first compressor.