Unit installation

62
A5 FP1
A6 TH2 SSPS (Thermistors) (second compressor)
A7 CB2 MT Circuit breaker (second compressor);
A8 O2 Oil level alarm (second compressor); (only for screw compressor)
A9 HP2 High Pressure Switch (second compressor)
A10 FP2 Fans MT protection (second circuit)
A11 FL Flow switch (used only in mother board)
A12 EXEN External Enable
A13 EMERGENCY Emergency Mode Enable
A14 Spare
A15 TBD Pump 1 MT protection; TBC
A16 TBD Pump 2 MT protection; TBC
A17 TBD Available TBC
A18 TBD Available TBC
A19 TBD Available TBC
A20 TBD Available TBC
DIGITAL OUTPUT
Relays (250 V AC, (8) 5 TBC A)
Definitive MNEM Description
1O 1C CP1 Compressor 1
2O 2C SOL1 /
ECO1
Refrigerating fluid solenoid valve or ECO port (first circuit)
3O 3C HD1 Head discharge (i.e. compressor unloader) first compressor
4O 4C CP2 Compressor 2
5O 5C SOL2 /
ECO2
Refrigerating fluid solenoid valve or ECO port (second circuit);(not used with twin
compressor)
6O 6C HD2 Head discharge (i.e. compressor unloader) second compressor
7O 7C HGBS Hot Gas Bypass Solenoid (used only in mother board)
8C 8NO
8NC
ALL General Alarm Remote indication (repeater)
9O FA1_1 Fan # 1 (first circuit)
10O FA2_1 Fan # 2 (first circuit)
C Common contact for relay 9 to 12
11O FA3_1 Fan # 3 (first circuit) / LIE1 (Liquid Injection on ECO);
12O FA4_1 Fan # 4 (first circuit) / LIS1 (Liquid injection on Suction) / LIE1 (Liquid injection on
ECO) / LIS1 + LIE1
13° FA1_2 Fan # 1 (second circuit); (not used with twin compressor)
14° FA2_2 Fan # 2 (second circuit); (not used with twin compressor)
C Common contact for relay 13 to 16
15° FA3_2 Fan # 3 (first circuit); / LIS1 (Liquid injection on Suction) / LIE1 (Liquid injection on
ECO) / LIS1 + LIE1 (not used with twin compressor)
16° FA4_2 Fan # 4 (second circuit) / LIS2 (Liquid injection on Suction) / LIE2 (Liquid injection
on ECO) / LIS2 + LIE2 (not used with twin compressor)
17O 17C TBD Pump1 TBC
18O 18C TBD Pump2 TBC Cooler Heater Wrapped
For connection details, refer to the wiring diagram.
ATTENTION
(