Multimaster Function - Pfannenberg DTT 6101 Serie Instrucciones De Servicio

ENG
3.4.10

Multimaster function

Fig. 11: Multimaster Control
The Multimaster function can control up to six cooling units in the system (bus function). Several cooling units are connected
with each other by a 2-wire bus for this.
Functional description
• In the bus function, the cooling unit that reaches the switching threshold "T
• It is ended by the cooling unit that drops below the switching threshold "T
• The energy-saving mode is ended by the cooling request of one of the cooling units in the bus function.
• The energy-saving mode is reactivated 30 minutes (delivery condition) after the last cooling request of one of the cooling
units in the bus function.
• If the minimum temperature alarm is triggered (Lit_, falling below the lower temperature limit), check the affected unit. If
the unit is part of a Multimaster system, the cooling requirement can be forced from another unit. If this is the case, the
proper functioning of each unit involved in Multimaster operation must be checked.
NOTE
• All cooling units in the bus function can activate or end the cooling mode or the energy-saving mode. There is no
"master and slave function".
• For details of the electrical connection, see section "Multimaster Control", Page 44.
Operating Manual | Roof-mounted Cooling Unit | Multi Controller (MC) – 115 V | 086100027c
+ K" f irst activates the cooling mode.
nom
- K " last.
nom
24/78