Full Gauge Controls TC-900E Log Quick Start Manual page 6

F22 - Fan stop due to high temperature in the evaporator:
This aims at switching off the evaporator fan until the evaporator temperature approaches the
temperature provided in the project design, thus avoiding high suction pressures and temperatures that
could damage the compressor.
During the refrigeration process if the evaporator temperature exceeds the adjusted value, the fan is
switched off, being switched on again with a fixed hysteresis of 2°C / 4°F. It is a valuable resource when,
for example, a cold storage installation is started up after several days of inactivity, or when a walk-in
chamber or display is replenished with goods.
F23 - Room temperature indication offset S1:
It allows compensating possible deviations in the room temperature reading (S1) caused by the
replacement of the sensor or changes in the cable length.
F24 - Address of the instrument in the RS-485 network:
Equipment's network address for communicating with Sitrad software.
NOTE: Every single controller within the network must have different address.
F25 - Number of defrosts per day (Monday to Friday):
The defrost cycles are evenly distributed in accordance with the number of defrosts set per day, always
considering the preferred time. The values can be adjusted to 1, 2, 3, 4, 6, 8, or 12. This function works
with the Monday to Friday operation schedule.
F26 - Preferred time to start defrosting (Monday to Friday):
A preferred time (reference time) for the daily defrost to be performed must be set. This function works
with the Monday to Friday operation schedule.
F27 - Number of defrosts per day (Saturday):
The defrost cycles are evenly distributed in accordance with the number of defrosts set per day, always
considering the preferred time. The values can be adjusted to 1, 2, 3, 4, 6, 8, or 12. This function works
with the Saturday operation schedule.
F28 - Preferred time to start defrosting (Saturday):
A preferred time (reference time) for the daily defrost to be performed must be set. This function works
with the Saturday operation schedule.
F29 - Number of defrosts per day (Sunday):
The defrost cycles are evenly distributed in accordance with the number of defrosts set per day, always
considering the preferred time. The value can be adjusted to 1, 2, 3, 4, 6, 8, or 12. This function works
with the Sunday operation schedule.
F30 - Preferred time to start defrosting (Sunday):
A preferred time (reference time) for the daily defrost to be performed must be set. This function works
with the Sunday operation schedule.
F31 - Normal setpoint:
It is the desired room temperature. It is the reference value for the temperature control.
F32 - Economic setpoint (SPE):
It is the desired room temperature when the instrument is operating in economy mode.
F33 - Economic setpoint control differential (hysteresis):
It is the temperature difference (hysteresis) between switching ON and OFF the refrigeration control
output in the economy mode.
F34 - Door closed time for activating the economy mode:
If the door is kept closed for a time equal or greater than the one configured in this function and the
normal setpoint is or has been reached, the controller will activate the economy mode. After that the
controller will operate with the economic setpoint until any condition to deactivate it is met (see 6.3.3).
This function is disabled when configured with[no,,](0).
F35 - Temperature difference (S3-S1) below which the economic setpoint is activated:
When the temperature difference between sensor 3 and sensor 1 is below the value adjusted in this
parameter, the controller starts to operate in the economy mode.
F36 - Temperature difference (S3-S1) above which the normal setpoint is activated:
When the temperature difference between sensor 3 and sensor 1 is above the value adjusted in this
parameter, the controller starts to operate with the normal setpoint.
F37 - Maximum time on power-saving mode:
It allows configuring the maximum time in economy mode. After this time the setpoint returns to the
normal operation setpoint. This time is disregarded if configured as [tOFF] .
F38 - Temperature limit for Fast Freezing:
It is the minimum temperature that the instrument can reach during the fast freezing process.
F39 - Maximum Fast Freezing time:
It is the time duration of the fast freezing process.
F40 - Fan on time:
F41 - Fan off time:
They define the time for which the fan is kept on and off when operating in the cyclic mode.
F42 - Compressor on time in case of S1 fault:
F43 - Compressor off time in case of S1 fault:
They define the compressor on and off times when it is operated in the cyclic mode. This condition
happens when sensor S1 is disconnected (or faulty) and when parameter F11 is configured as
[,,,2].
F44 -Time to collect the gas before starting the defrost:
When starting the defrost the controller will keep only the fan on during this time to take advantage of
the residual energy of the gas. This time will be disregarded in case of defrost at power up.
F45 - Condition to start the defrost (0 - time / 1 - temperature):
It defines the condition to start the defrost:
[,,,0]- Time
[,,,1]- Temperature
Before starting the defrost process the controller will observe the minimum time of compressor on or off
(F09 and F10) and the gas collection stage (F44).
NOTE: This function is ignored when the defrost schedule is enabled (F01 = 1 or F01 = 2).
F46 - Maximum open door time for instantaneous defrost:
During the cooling step, if the door is kept open for a time longer than the one defined in this function,
the instantaneous defrost will take place. If the door is open at the beginning of the refrigeration
process, the counting of this time is reset. This function is disabled when configured with [no,,] (0).
F47 - Evaporator temperature (S2/S3) to start defrosting:
When the evaporator temperature is below the value configured in this function the controller will start
the defrost. If sensor S3 is configured as the second evaporator sensor (F57), the controller will start
the defrost as soon as one of the sensors, S2 or S3, meets this condition. This function is disregarded
when the condition to start the defrost is time (F45).
F48 - Door open time to switch off the fan:
For safety reasons, after a time with the door open equal or longer than the one adjusted in this function
has elapsed, the fan will be switched off in the refrigeration step. This function is disabled when
configured with[no,,] (-1).
F49 - Door open time to switch off the control outputs:
For safety reasons, after a time with the door open equal or longer than the time adjusted in this function
has elapsed, the outputs will be switched off (compressor, fan, and defrost). This function is disabled
when configured with [no,,] (0).
F50 - Maximum condenser temperature (S3) to switch off the control outputs:
Above this temperature, in addition to the indication of the visual and audible alarms ([atC2]) the
loads activated by the outputs will be switched off. This alarm will be deactivated if the S3 input is
configured (F57) for another function.
F51 - Control differential for the maximum condenser temperature (hysteresis):
For the loads to be switched on again, the temperature in sensor S3 (condenser) must drop to the value
adjusted in F50 minus the value configured in this parameter.
F52 - Compressor on time without reaching the setpoint to switch off the control outputs:
It is the maximum time the compressor will remain on without reaching the setpoint during the cooling
process. If this time is exceeded, the outputs will be switched off (compressor, fan, and defrost), and the
visual and audible alarms will be activated [ALrC]. This function can be disabled by adjusting it to the
minimum value[no,,](0).
NOTE: In this condition the controller must be switched off and on again to resume normal
operation.
F53 - Room temperature alarm delay:
When this configuration is active, the temperature must remain in the alarm condition for the time
defined in this parameter so the alarm can be triggered.
It will avoid false alarms originating from punctual temperature variations, like after a defrost.
F54 - High condenser temperature alarm (S3):
It is the condenser temperature above which the controller will indicate the visual ([atC1]) and
audible (F56) high temperature alarm. This alarm will be deactivated if the S3 input is configured (F57)
for another function.
F55 - Open door time for the alarm to go on:
If the door is kept open for a time equal or longer than the one configured in this parameter the controller
will activate a visual and audible (F56) door open alarm. The alarms are suspended when the door is
closed. The visual alarm can be inhibited through the key >(pressed for 2 seconds). For the door open
alarm to work, one of the digital inputs must be configured as door contact (F57 and F58). This function
is disabled when configured with [no,,] (0).
F56 - Enable buzzer:
Allows enabling and disabling the internal buzzer for alarm signaling.
F57 - Function of the digital input 1 / sensor S3:
[Off,]Off
[,,,1]Digital input: Activate economic setpoint (NO switch)
[,,,2]Digital input: Force defrost (NO switch)
[,,,3]Digital input: Force fast freezing (NO switch)
[,,,4]Digital input: External alarm (NO)
[,,,5]Digital input: Door contact (NO)
[,,,6]Digital input: Activate economic setpoint (NC switch)
[,,,7]Digital input: Force defrost (NF switch)
[,,,8]Digital input: Force fast freezing (NC switch)
[,,,9]Digital input: External alarm (NC)
[,,10]Digital input: Door contact (NC)
[,,11]Sensor S3: Temperature difference for economic setpoint (S3-S1)
[,,12]Sensor S3: Condenser temperature control
[,,13]Sensor S3: Second evaporator temperature control
[,,14]Digital input: pressostat 1 status, contact NO
[,,15]Digital input: pressostat 1 status, contact NC
[,,16]Digital input: high pressure switch, contact NO
[,,17]Digital input: high pressure switch, contact NC