Remak VCS Installation And Operating Instructions Manual page 110

Electronic Expansion Valve Overheating Controller EC3-X33
ECD-002 Display Installation
The ECD-002 display can be connected at any time during
operation. The EC2-371 is integrated into a 71 x 29mm panel
– see dimensional drawing.
Insert the device into the panel (1).
The swivel lugs must be inserted into the device edges. Use
the provided Allen wrench and turn the openings in the front
face to move the lugs along the guides until they contact the
panel wall (2).
Using the wrench, tighten both lags to the back panel wall so
that the device cannot move – see figure (3).
Troubleshooting
Code Cause
Pressure sen-
E0
sor failure
Temperature
E1
sensor failure
EX valve not
A
connected
Ab
Defective
Ab
battery
Ab flashes
Er
Display error
Message "---" (no data displayed): Display shows only dashes "---" during start and if no data for display are available.
Note: If more failures occur at the same time, the most serious failure is valuated and displayed first before the other less seri-
ous failures. Operating data will be displayed once all failures have been resolved.
Check of System Operating Conditions
Data to be permanently displayed on the display can be selected (parameter 1). Temporarily, other data can also be displa-
yed. This function cannot be set during a failure. The display shows numerical values for 1 second (see parameter 1) and
then the selected parameter. After 5 minutes, it returns to the selected parameter 1.
Failure
Operational over-
heating differs from
pre-set overheating
Low overheating
– wet operation
The valve does not close
Unstable overheat-
ing – cycling
The valve performs
contrary in relation to
the EX3 command
The valve will not open at
high pressure difference
Overheating change
after some time
108
Relay
Function
H
closes
closes
closes
b1=1
b1=2 closes
b1=3 closes
Possible reason
Defective sensors
- Defective sensors
- Incorrect el. connection of the
EX valve
- The digital input I is energized.
- Wrong parameters
Unsuitable evaporator
Incorrect el. connection
Incorrect settings of
the "u" parameter
The motor needs to
be synchronized
1
3
Attention! DO NOT tighten too much to prevent
the lugs to be broken.
Valve
closes Check PT4 sensor and its connection.
closes Check NTC sensor and its connection.
Check the valve wiring and power supply.
working Low capacity, charge or replace the battery. If the
signal is weak once the battery has been charged,
closes
replace the battery. This can happen if the battery
closes
has not been used for a long time.
Data for the display are out of its range. Check the
sensors.
- Check the connection.
ECN-N60 temperature sensor must be used.
- PT4 pressure sensor must be used according to the manual for the given
coolant.
- The sensor conductors must be routed apart from the power conductors.
Check the sensors and connections of the valve - EC3, el. conductor.
The valve will close if the input is energized, I = 0V. Check the settings
Select higher overheating – find stable settings
Connect the conductor colours correctly according to the wiring diagram.
Check and adjust the settings
The digital input must not be permanently energized with 24V, it is necessary to
switch off the power 1x per week for 5 seconds if the compressor does not stop.
2
Remedy
Remedy
Reset
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