Electrical Connections - Eliwell IWP750 Anleitung

Important! Make sure the machine is switched off before working on the electrical connections.
The device is equipped with:
• IWP power module: FASTON screw terminals to connect electrical cables, the cross-section of which must not exceed 2.5mm
(one wire per terminal for power connections): see the rating plate on the device for terminal ratings.
• IWK keyboard: Screw terminals to connect electrical cables, the cross-section of which must not exceed 1.5 mm
terminal for power connections): see the rating plate on the device for terminal ratings.
The relay outputs are voltage free. Do not exceed the maximum permitted current; for higher loads, use a contactor with sufficient
power capacity. Make sure that power supply is of the correct voltage for the instrument. Probes have no connection polarity and
can be extended using a normal bipolar cable (note that the extension of the probes influences the instrument's electromagnetic
compatibility -EMC: take great care with the wiring).
Probe cables, power supply cables and the TTL serial cables should be routed separately from power cables
It is recommended, for security reasons, that the instrument is installed on insulating supports/columns.
Fault Cause
Label
Probe 1 faulty • Measured values are outside operating range
E1
(cold room) • Probe faulty/short-circuited/open
Probe 2 faulty • Measured values are outside operating range
E2
(defrost) • Probe faulty/short-circuited/open
HIGH temperature Value read by probe Pb1 > HAL after time of "tAO".
AH1
alarm Probe 1 (see " MAX/MIN TEMPERATURE ALARMS ")
LOW temperature Value read by Pb1 < LAL after time of "tAO".
AL1
alarm probe 1 (see " MAX/MIN TEMPERATURE ALARMS ")
Defrost due to End of defrost cycle due to timeout rather than due
Ad2
timeout to defrost end temperature being read by probe Pb2.
External Activation of a digital input (DI)
EA
alarm (DI4 configured as External Alarm - H14 = ±5 )
Activation of a digital input (DI) for a time greater
Door
Opd than "tdO".
open alarm
(By default DI1 is set as door switch)
General pressure Activation of pressure alarm by general pressure
PA
alarm switch regulator.
Low pressure Activation of low pressure switch alarm by low pres-
LPA
alarm sure switch regulator.
High pressure Activation of high pressure switch alarm by high
HPA
alarm pressure switch regulator.
No link between
• Communication fault between Power module and
E7 power module
Keyboard
and keyboard
Parameter DESCRIPTION
Setpoint. Control value whose range is between the minimum Setpoint LSE and the maximum Setpoint HSE.
SEt
The SEtpoint is visible from the machine status menu and not from the programming menu.
COMPRESSOR (folder CP)
diFferential. Compressor relay activation differential; the compressor stops on reaching the Setpoint value (as indicated by the
diF regulation probe) and restarts at a temperature value equal to the Setpoint plus the value of the differential.
N.B.: it cannot be equal to 0.
Higher SEt. Maximum value that can be assigned to the Setpoint.
HSE
N.B.: The two Setpoints are interdependent: HSE (maximum Setpoint) cannot be less than LSE (minimum Setpoint) and vice-versa.
Lower SEt. Minimum value that can be assigned to the Setpoint.
LSE
N.B.: The two Setpoints are interdependent: HSE (maximum Setpoint) cannot be less than LSE (minimum Setpoint) and vice-versa.
Offset SetPoint. Temperature value to be added algebraically to the setpoint if reduced set enabled (Economy function). Enabling can
OSP
be key-controlled, with specially configured key
ON time (compressor). Compressor start time in the event of faulty probe.
Ont - if Ont = 1 and OFt = 0, the compressor will always stay on (ON).
- if Ont > 0 and OFt > 0, it will run in duty cycle (see Duty Cycle diagram).
OFF time (compressor). Compressor switch-off time in the event of a probe fault.
OFt - if OFt = 1 and Ont = 0, the compressor will always stay off (OFF).
- if Ont > 0 and OFt > 0, it will run in duty cycle (see Duty Cycle diagram).
dbi delay between power-on. Dealy time between switch-ons; the delay time indicated must elapse between two consecutive compressor switch-ons.
delay Output (from power) On.
OdO (!)
Delay in activating outputs after the instrument is switched on or after a power failure. 0 = not active.
IWP750 + IWK HORIZ PLUS DISPLAY

ELECTRICAL CONNECTIONS

DIAGNOSTICs
Effects
• Label E1 displayed
• Alarm icon permanently on
• Max and min alarm regulator disabled
• Compressor operation based on parameters Ont" and
• Label E2 displayed
• Alarm icon permanently on
• The defrost cycle will end due to Time out (Par. "dEt")
• Label AH1 recorded in folder AL
• No effect on regulation
• Label AL1 recorded in folder AL
• No effect on regulation
• Label Ad2 recorded in folder AL if parameter dAt=1;
• Alarm icon permanently on
• Label EA recorded in folder AL
• Alarm icon permanently on
Regulation blocked if EAL = y
• Label Opd recorded in folder AL
• Alarm icon permanently on
Regulation blocked if dOd = y
• Label PA recorded in folder AL
• Regulation blocked
• Label LPA recorded in folder AL
• Regulation blocked
• Label HPA recorded in folder AL
• Regulation blocked
• Label E7 recorded in folder AL
• No effect on regulation
IWP POWER MODULE - PARAMETERs table
"OFt".
not shown if dAt=0
(one wire per
2
Remedy
• Check probe is an NTC one
• Check the probe wiring
• Replace probe
• Check probe is an NTC one
• Check the probe wiring
• Replace probe
Wait until temperature value read by probe1 returns
below HAL.
Wait for the temperature value read by probe1 to
come back above LAL.
Wait for the next defrost cycle for automatic reset.
Check and remove the external cause which trig-
gered the alarm on the digital input (D.I.).
• Close the door
• Delay function defined by OAO
• Switch the device off and back on again
• Reset alarms on opening the alarms folder.
• Switch the device off and back on again
• Reset alarms on opening the alarms folder.
• Switch the device off and back on again
• Reset alarms on opening the alarms folder.
• Wait for any disturbances to disappear.
• During configuration, switch off all devices then
switch them back on again.
RANGE UM
IWP750
LSE ... HSE °C/°F 0.0
0.1 ... 30.0 °C/°F 2.0
LSE ... 302 °C/°F 5.0
-58.0 ... HSE °C/°F -5.0
-30.0 ... +30.0 °C/°F 0.0
0 ... 250 min 15
0 ... 250 min 15
0 ... 250 min 2
0 ... 250 min 0
2
Level
User
User
User
Inst
Inst
Inst
Inst
User
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