NOTE:
Never operate a Keel Cooled system while the boat is out of the water without having first
rigged some form of temporary water cooling on the Keel Cooler. If a Capri air cooled condensing
unit or an Air Add-On air cooled condenser is installed together with a Keel Cooler, ensure that the
fan is operated only when the boat is out of the water, and then switched off when the boat is
launched.
-----------------------------------------------------
Chapter 5
Danfoss/Secop Electronic Controller for Frigoboat systems
The Danfoss/Secop Electronic Controller is an integral part of the Danfoss/Secop BD compressor
system. It transforms direct current power from the vessel’s batteries into modified alternating current
to run the compressor.
Never attempt to run the compressor directly from the batteries or other
power source.
5:1
Voltage
A supply voltage of either nominal 12 or 24 volts dc is required. The controller will run from either
voltage without any special settings or adjustments, switching automatically to 24v mode if the voltage
is above 17v.
5:2
Multi-speed compressor
Depending on the system, automatic or manual compressor speed selection is used to run the
compressor at speeds between 2000 RPM and 3500 RPM.
NOTE: With no form of compressor speed
control installed, the compressor will run at the slowest speed and with the lowest capacity.
The Paris
35F has no speed control, running at 2000 RPM. All others must have either a manually adjustable
compressor speed controller like a Speed Board, or alternatively, an automatic smart speed control
such as the
Merlin II
Smart Speed Controller. If your compressor unit comes with a Speed Board
installed and you are installing a
Merlin II
, the Speed Board must be removed from the Danfoss/Secop
controller.
5:3
Fault Codes
Protection is provided for the following:
(1)
Low voltage.
To prevent the batteries from being totally discharged, the compressor will be
stopped if the voltage at the terminals on the controller falls below 10.4volts (22.8v on a 24v
system). It will not re-start until the voltage rises above 11.7 volts (24.2 on a 24v system).
(2)
High voltage.
If the voltage exceeds 17v, the controller stops the compressor and switches
into 24v mode, but will not attempt to start the compressor until the voltage reaches 24.2v.
(3)
Compressor non-start.
If the compressor does not start, the controller will cease the starting
process and attempt a re-start approximately every 45-90 seconds.
(4)
Compressor speed too low.
If the compressor speed falls below 1900 RPM the controller will
stop the compressor.
(5)
Fan (and pump) protection.
If the current draw across the fan terminals exceeds 0.7 amps at
12v dc, the compressor will be stopped and a re-start attempted every 45-90 seconds.
(6)
Module overheat.
If the heat sink on the controller exceeds 100 deg C (212 deg F), the
compressor will be stopped and will be re-started when normal operating temperatures are
resumed.
