Fault Display Codes; Fault Handling Protocol - Dometic DDC Operation Manual

Fault Display Codes

The following lists the fault mnemonic and the displayed
code:
1. High Freon pressure fault = HiP
2. Low Freon pressure fault = LoP
3. Chilled water flow failure = FLO
4. Return Water Sensor failure = Sen
5. High Water Limit Sensor failure = HSn
6. Freeze stat = FrE
7. Freeze Sensor Failure = FSn
8. High Water Limit fault = HiL
9. Low AC Voltage fault = LAC

Fault Handling Protocol

1. When a fault occurs, the staging delay is initiated and
the appropriate mnemonic flashes in the display.
2. At the end of a staging delay the unit will restart if all
faults have cleared.
3. Four consecutive HiP or LoP faults will cause the
system to shut down.
4. The stored fault count is cleared if a cycle is completed
successfully.
5. Restore operation by correcting the fault and resetting
the unit by turning the mode switch or AC power off and
on.
6. LAC is displayed if line voltage is less than 85 VAC for
115 volt units or less than 170 VAC for 230 volt units.
This fault has a ten (10) minute shut down delay.
7. LoP has a ten (10) minute shut down delay.
8. FrE is displayed when the unit is off on freeze protection.
9. HiL is displayed when the unit is off on High
Temperature Limit protection.
10. FLO has a ten (10) second shut down delay.
L-2281 Operation
9
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English