Space Pak LAHP48, Installation, Operation & Maintenance Manual

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Model LAHP48 Air to Water Heat Pump — Installation, Operation & Maintenance Manual
Section 10: Fault Codes
Figure 19 Fault Codes
Alarm
Display
Alarm type Reset Logic
Compressor
Response
Pump
Response
Fans
Response
Heater
Response
A1 Freeze error Automatic Stop None Stop Enable
Aht High water temp at startup Automatic Stop None Stop None
dF1 Defrost error, cycle time exceeded Automatic None None None None
E1 Return water temp sensor fail Automatic Stop None Stop Stop
E2 Supply water temp sensor fail Automatic Stop None Stop Stop
E3 OS coil temp sensor fail Automatic None None None None
E4 Refrigerant pressure sensor fail Automatic Stop None Stop None
E8 Ambient temp sensor fail Automatic None None None None
ESP Lost com. with expansion module Automatic Stop Stop Stop Stop
FL Water system low flow Automatic Stop Stop Stop Stop
Hc1 Service hours notification Automatic None None None None
HP1 Refrigerant High Pressure fault Auto x3, then Manual Stop None Run 60 sec None
Ht High water temp Automatic None None None None
LHt Low Water temp at startup Automatic Stop None Stop None
LP1 Refrigerant Low Pressure fault Auto x3, then Manual Stop None Run 60 sec None
tC1 Compressor over current or delivered water too cold Automatic Stop Stop Stop Stop