Operations Manual

11
ALARM SIGNALS
Message Cause Outputs
“P1”
Room probe failure Compressor output time, 6 min on, 4 min off
“P2”
Evaporator probe failure Defrost end is timed
“HA”
Maximum temperature alarm Outputs unchanged.
“LA”
Minimum temperature alarm Outputs unchanged.
NOTE:
Probe alarms “P1” and “P2” start some seconds after the fault in the related probe; they
automatically stop some seconds after the probe restarts normal operation. Check
connections before replacing the probe.
Temperature alarms “HA” and “LA” automatically stop as soon as the thermostat
temperature returns to normal values and when defrost starts.
ELECTRICAL CONNECTIONS
The controller is provided with screw terminal block to connect cables with a cross section up to 2,5 mm
2
.
Before connecting cables make sure the power supply complies with the control’s requirements. Separate the
probe cables from the power supply cables, from the outputs and the power connections. Do not exceed the
maximum current allowed on each relay, in case of heavier loads use a suitable external relay.
PROBE CONNECTIONS
The probes shall be mounted with the bulb upwards to prevent damages due to casual liquid infiltration. It is
recommended to place the thermostat probe away from air streams to correctly measure the average room
temperature. Place the defrost termination probe among the evaporator fins in the coldest place, where most
ice is formed, far from heaters or from the warmest place during defrost, to prevent premature defrost
termination.
BLG/TLG CABINET COMPONENT AMP DRAW
VOLTAGE AMPS AT AMPS AT
ITEM
PART
NO.
RATING CABINET 208 VOLTS 230 VOLTS NOTES
Coil Defrost Heater 17-09408 230 V BLG/TLG-48, 52 3.9 4.3 Check Red or Black Leg
Coil Defrost Heater 17-01311 230 V BLG/TLG-74, 80 6.3 7 Check Red or Black Leg
Condensate Heater 230 V BLG-48, 52, 74, 80 1.2 1.3 Check Red or Black Leg
Condensate Heater 201I130 230 V TLG-48, 52, 74, 80 1.2 1.3 Check Red or Black Leg
Door Frame Heater 17-09419 115 V BLG/TLG-48, 52, 74, 80 .33 ea .37 ea Check Black Leg
Door 31-02602 120V BLG/TLG-48, 74 .55 ea .60 ea Check Black Leg
Door 31-02603 120V BLG/TLG-48 .55 ea .60 ea Check Black Leg
Door 31-02604 120V BLG/TLG-52, 80 .76 ea .84 ea Check Black Leg
Door 31-02605 120V BLG/TLG-52 .76 ea .84 ea Check Black Leg
Drain Heater 17-00404 115 V BLG/TLG-48, 52, 74, 80 0.05 0.06 Check Black Leg
VOLTAGE AMPS AT AMPS AT
ITEM
PART
NO.
RATING CABINET 104 VOLTS 115 VOLTS NOTES
Coil Defrost Heater 17-09407 120 V BLG/TLG-27 4.3 4.8 Check Black Leg
Condensate Heater A321-130 115 V BLG-27 2.3 2.6 Check Black Leg
Condensate Heater 323I130 115 V TLG-27 2.3 2.6 Check Black Leg
Door Frame Heater 17-09419 115 V BLG/TLG-27 0.33 0.37 Check Black Leg
Door 31-02600 120V BLG/TLG-27 .81 ea .90 ea Check Black Leg
Drain Heater 17-00404 115 V BLG/TLG-27 0.05 0.06 Check Black Leg