Dometic PGD1 - Page 41

41
EN
VARC Chiller Controls Troubleshooting
Alarm Reset Delay
Alarm
Relay
System Action Corrective Actions
Alarms Power+ n˚1
None
1:Overcurrent
2:Motor Overload
3:Overvoltage
4:Undervoltage
5:Over Temp
6:Under Temp
7:Overcurrent HW
8:Motor Overtemp
9:Drive Failure
10:CPU Error
11:Param Default
12:DC bus ripple
13:Data Comms Fault
14:Drive thermistor
15:Autotune fault
16:Drive disabled
17:Motor Phase
18:Fan Fault
19:Speed Fault
20:PFC Failure
21:Overvoltage
22:Undervoltage
23:STO Detection
24:Reserved
25:Ground Fault
26:CPU Sync 1
27:CPU Sync 2
28:Drive overload
29:Reserved
…
99:Unexpected
inverter stop
Manual Immediate Yes Turns off compressor • Check the load.
• Check the network control
devices and cables.
• Check the input voltage.
• Using a 1000 V
megohmmeter, check the
motor and motor cables for
ground faults.
• Check the input and output
circuits for phase loss
detection.
• Check the condition of the
motor and load wiring.
Chilled Water Flow Aer three
retries every
30 minutes,
must be reset
manually
Immediate Yes Turns off compressor or
heat relay
• Check for proper loop water
flow and make sure the
strainers are not clogged.
• Check for a defective flow
switch.
• Bleed air out of the loop
water.
• Check the loop water pump.
Chilled Water Return
Sensor Failure
Manual Immediate Yes Turns off VARC • Check the sensor for shorts
and opens.
• Compare the temperature
reading with the digital
thermometer.
Chilled Water Supply
High
Manual 10 sec Yes Turns off compressor or
heat relay
Check for low water flow due to
restrictions or pump wear.
Chilled Water Supply
Low
Manual 10 sec Yes Turns off compressor or
heat relay
Check for low water flow due to
restrictions or pump wear.