Malfunction Indications and Safeties Overview ESIE11-02
3–12 Part 3 – Troubleshooting
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Alarm indicators on
I/O PCB
The table below describes the alarm indicators on the I/O PCB.
Alarm indications
on I/O PCB
The table below describes the alarm indications on the I/O PCB.
If more than one alarm is present, the reverse phase has the highest priority.
Service information
for alarm
indications
■ If the error is solved, H1P and H2P keep their latest status. They can only be reset by switching
OFF/ON the power from the I/O PCB.
■ If alarm codes fl and hp1 are flashing alternately, the alarm is likely to be caused by the reverse
phase protection or by the fuse for evaporator heater tape (F4) that was blown.
Symbol Indication
HAP Green LED
■ Blinking = CPU OK
■ Not blinking = CPU NOK
H1P Red LED
H2P Red LED
Indication H1P H2P
No error OFF OFF
Safety device ON OFF
Reverse phase OFF ON
Sensor defective ON ON
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