Original manual – Iss. 0.1
User manual – BM 3E Freezer
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6.19
Setting the air filter check interval
This operation must be performed by a qualified technician. It entails opening the rack and setting switches on the
Artic board.
Image
Description
Command
Artic board
Set the desired value based on the codes shown
below.
The SW2 switches must be set exactly as shown in the table below:
Switch No.
1
2
3
4
Time delay
Case 1
0 or 1
0
0
0
6 months
Case 2
0
1
0
0
8 months
Case 3
0
0
1
0
12 months
Case 4
0
0
0
1
14 months
6.20
BoSS system
The BoSS system ensures that the freezer will operate in the event of a malfunction on the 24 V circuit board provided
that the mains supply is present. The compressors are then powered continuously, but are not regulated by the PLC.
Your samples are thus safe, with no risk of a temperature rise.
Trigger principle:
1. If the 24 V supply to the regulator is cut off due to a fault on the circuit board, the regulator is powered by the 24 V
batteries, the alarm light is not lit and the freezer operates normally, powered by the backup batteries.
2. If the battery voltage drops to 20 Volts (±2 V) or if the controller does not activate its heartbeat signal, the BoSS
system is triggered, the alarm indicator and buzzer on the freezer front panel are triggered and the regulator display is
lit. The compressors are connected directly to the 230 V supply with no regulation system.
The temperature in the freezer may fall to –90°C ±2°C.
3. After 40 hours (±1 hour), the regulator display stops. The compressors remain in continuous operation with no
regulation, and the alarm indicator is not lit.
The freezer can operate under the BoSS system for several days without difficulty. However, Froilabo’s service
department should be contacted to schedule a repair.
Warning: THESE SPECIFICATIONS WERE OBTAINED USING NEW BATTERIES CHARGED FOR AT LEAST 24 HOURS.
