Troubleshooting; Trouble Display Table - Sanyo SHP-TH90GDN-SW Technical Manual

Trouble display table

First check the details of the trouble display, and then be absolutely sure to turn off
the power.
<Tank unit>
Display
SENSOR Primary flow sensor trouble
PRIMARY FLOW
SENSOR Tank temperature sensor trouble
TANK TEMP
SENSOR ROOM Room sensor trouble
SENSOR EL UP Electric heater Sensor trouble
SENSOR EL LO
SENSOR OUT Outdoor sensor trouble
COMM ERROR Serial communication error
Trouble
Open-circuit or short-circuit in sensor itself or lead wires
<Diagnosis>
• Defective contact of connector or defective crimping of
• Defective tank unit PCB
Serial communication error
<Diagnosis>
• Inadequate power supply due to incorrectly plugged in
• Defective in the current fuse in heat pump unit
• Defective PCB in tank unit or heat pump unit
Criteria and diagnosis
terminal
connector or Incorrectly wired power cable or
communication cable