v. 3.0
Reference guide
Compressor Control Module CM-RC-01
3.0
13 / 44
There are nine zones in the application limit as shown on the figure below.
Zone zero (the green-shaded area) is the normal, safe operation area within the application limits.
A warning and a fault will be given if the warning level
or fault level is reached.
After a stop due to fault limit, the fault can be reset when the compressor is stopped. If timed
resets are enabled, the CM-RC-01 will perform a timed reset otherwise an external reset is
required. The CM-RC-01 will start the compressor again if the start command is active or when it
is applied again.
Please observe:
There is no Application limits monitoring the first period after start of the
compressor. The period varies for the compressor type, can be up to 120 s.
4.2.7
Short-cycling warning
To protect the motor windings, the module will give a warning if the compressor is started too
many times within 1 hour, but the compressor will not be locked.
4.3
Datalog
The built-in data logger stores operation data, sensor data, alarms and events for further analysis
using the BEST Software.
The data are stored in the data logger flash memory at regular intervals together with counters
and statistics data collected and summarized over time. The lifetime of the different data varies.
The datalog contains the following type of entries
Alarms
Events
Datalog information
Periodic data
Statistics and counters
6.SH
2.SL
1.SLDL
3.SLDH
4.DH
5.SHDH
7.SHDL
8.DL
Evaporating temperature t
0
(SST) [°C]
C
o
n
d
en
si
n
g
te
m
p
er
at
u
re
t
c
(
SD
T)
[°
C
]
0: Ok
Zone number, description and alarm number:
Zone 1: SST Low, SDT Low
3001
Zone 2: SST Low
3002
Zone 3: SST Low, SDT High
3003
Zone 4: SDT High
3004
Zone 5: SST High & SDT High 3005
Zone 6: SST High
3006
Zone 7: SST High & SDT Low 3007
Zone 8: SDT Low
3008
Zone 0: Normal operation within application
limit and no alarms
t
0
(SST) = Evaporating temperature
t
c
(SDT) = Condensing temperature
