Bitzer CM-SW-01 Translation Of The Original Instructions

ST-150-114
1 Introduction
The CM-SW-01 compressor control module integrates
the entire electronic periphery of the compressor:
The CM-SW-01 monitors the essential operating para-
meters of the OS.A95 compressor and protects the
compressor from operation under critical conditions.
The module continuously controls the compressor de-
pending on the capacity requirements of a superior sys-
tem controller. It controls the capacity, the internal
volume ratio (V
i
) and optionally the oil return. It also
supplies power to the associated solenoid valves. It en-
sures an unloaded start of the compressor and controls
the activation and deactivation of the motor contactors
during the start process. Additional time relays are not
required.
During the operation, numerous operating data of the
compressor can be tracked using the BEST Software,
for example, the position in the application limits dia-
gram. These data are recorded and allow the system
operation to be diagnosed. 4 coloured LEDs indicate
the operating condition of the compressor control mod-
ule.
This Technical Information describes the control and
monitoring functions, the electrical connection of of the
compressor control module and the communication
with the BEST software.
2 Safety
Compressors and compressor control module have
been built in accordance with state-of-the-art methods
and current regulations. Particular importance was
placed on user safety.
The notes given in the Operating Instructions SB-520
must be followed in addition to this Technical Informa-
tion.
Always keep the operating instructions SB-520 and this
technical information in the vicinity of the refrigeration
system during the whole lifetime of the compressor.
2.1 Authorized staff
All work done on the compressors, the refrigeration
systems and their electronic accessories may only be
performed by qualified and authorized personnel who
have been trained and instructed accordingly. The local
regulations and guidelines will apply with respect to the
qualification and expertise of the specialists.
2.2 Residual hazards
Compressors and electronic accessories may present
unavoidable residual risks. This is why any person
working on this device must carefully read this docu-
ment!
The following regulations shall apply:
• the relevant safety regulations and standards (e.g.
EN 378, EN 60204 and EN 60335)
• generally accepted safety rules,
• EU directives,
• national regulations.
2.3 Safety references
are instructions intended to prevent hazards. Safety ref-
erences must be stringently observed!
!
!
Notice!
Instructions on preventing possible damage to
equipment.
Caution!
Instructions on preventing a possible minor haz-
ard to persons.
Warning!
Instructions on preventing a possible severe
hazard to persons.
Danger!
Instructions on preventing an immediate risk of
severe hazard to persons.
2.3.1 General safety instructions
Warning!
Risk of electrical shock!
Before working on the module housing and
electrical lines: Switch off the main switch and
secure it against being switched on again!
Close the module housing before switching on
again!
!
!
Notice!
The compressor control module may be dam-
aged or fail!
Never apply any voltage to the terminals of CN7
to CN12 – not even for test purposes!
The voltage applied to the terminals of CN13
must not exceed 10V!
The voltage applied to terminal 3 of CN14 must
not exceed 24V! Do no apply voltage to the
other terminals!

Bitzer CM-SW-01 Specifications

General

Brand	Bitzer
Model	CM-SW-01
Category	Control Unit
Language	English