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Operation and Maintenance Instructions
Envistar Top 04-21
DSET.181201.00.EN
Continuous product development may give rise to specification changes without notice.
Alarm information for inverter and compressor
Alarm Climatix
(code
MX)
Alarm Carel
(code UC, MK,
US)
Explanation and corrective action
Peripherals
AL P02 Compressor Drive:
PERIPHERALS_ERROR
Communication error with the electronic expansion
valve.
Compressor runs at limited speed.
Outside operating range
AL C01 Compressor Drive:
OUT_OF_ENVELOPE
The compressor has worked outside its normal
operating range for a long time and stopped.
Automatic restart occurs after 60 seconds. After
10 repeated restart attempts, the error must be
remedied and the alarm reset.
Overcurrent
AL H01 Compressor Drive:
OVER_CURRENT
A too high current has been registered and the
inverter stopped. The alarm may be caused by e.g.
missing phase (power supply), earth fault, short
circuit, compressor fault or internal fault in the
inverter. The alarm needs to be reset after repeated
start attempts.
High DC voltage
AL H02 Compressor Drive:
DCLINK_VOLTAGE_HIGH
A too high voltage has been registered. The alarm
may be caused by e.g. a power outage. After 10
repeated alarms, the error must be remedied and the
alarm reset.
High inverter temp
AL H03 Compressor Drive:
DRIVE_TEMPERATURE_HIGH
A too high temperature in the inverter has been reg-
istered (>115°C) and the inverter stopped.
The alarm may be caused by e.g. a defective cool-
ing fan, blocked air flow or abnormally high ambient
temperature. The alarm needs to be reset.
Low supply voltage
AL H04 Compressor Drive:
SUPPLY_VOLTAGE_LOW
A too low supply voltage has been registered (<180
V). Check the voltage level. When the voltage
reaches normal level the inverter restarts.
The alarm may be the result of a tripped high
pressure switch (the inverter loses all power).
Reset by pressing the button on the pressure
switch.
High hot gas temp
AL D01 Compressor Drive:
DISCHARGE_TEMP_HIGH
A too high refrigerant temperature has been
registered.
The inverter attempts to restart once normal
temperature has been registered. After 10 restart
attempts, the error must be remedied and the alarm
reset.
Hot gas temp error
AL D03 Compressor Drive:
DISCHARGE_TEMP_INVALID
Hot gas temperature signal is faulty. There is
probably a fault with the wiring or sensor. The
inverter is stopped and restarts when the fault is
fixed.
MB communication er-
ror
AL D04 Compressor Drive:
MODBUS_COM_TIMEOUT
The inverter has lost Modbus communication with
Climatix control equipment and stopped.
Check the high pressure switch by pressing the
button.
When communication is restored, the inverter is
automatically started after 2 minutes.