Diagnosis And Troubleshooting; Fault Finding - Lochinvar Amicus LAHP302WW Installation, Commissioning, User And Maintenance Instructions

9.

DIAGNOSIS AND TROUBLESHOOTING

F
AULT FINDING
All units are checked and tested at the factory before shipment, however, during operation an anomaly or failure can occur.
Be sure to reset an alarm only after you have removed the cause of the fault; repeated reset may result in irrevocable
damage to the unit.
Code Alarm Description
ACF1 Configuration alarm
ACF2 Configuration alarm
ACF3 Configuration alarm
ACF4 Configuration alarm
ACF5 Configuration alarm
ACF6 Configuration alarm
ACF7 Configuration alarm
ACF8 Configuration alarm
ACF9 Configuration alarm
AEE
AEFL User water flow switch alarm
Compressor unloading alarm (only
AEUn
units with 2 compressors)
AHFL Domestic hot water flow switch alarm
Alarm user inlet water temperature
AP1
Alarm safety domestic hot water
AP10
Alarm user outlet water temperature
AP2
AP3 Alarm pressure transducer
Alarm finned coil sensor / defrost
AP4
Alarm domestic hot water inlet tempe-
AP5
Alarm domestic hot water outlet
AP6
temperature sensor
52 | P a g e
Eeprom alarm
sensor
sensor
sensor
sensor
rature sensor
Cause
Wrong configuration of microprocessor
control system.
Severe hardware damage in the
microprocessor control system.
Presence of air or dirtiness in the user
hydraulic system.
User water temperature is too high.
Presence of air or dirtiness in the user
hydraulic system.
Wrong electrical connection, Sensor
defect.
Solution
Contact the Lochinvar Limited.
Switch OFF the unit and, after few
second switch ON the unit; if the alarm
appears again contact the service.
Bleed carefully the user hydraulic system or
check and clean the water strainer.
Wait until the user water temperature is
lower.
Bleed carefully the user hydraulic system or
check and clean the water strainer.
Check the electrical connection of the
sensor to the terminal board, if correct
call the service to replace the sensor.