Troubleshooting With Microprocessor
Error
Code
Possible Causes Solutions
E1 Return water sensor contact loose/short Contact with the dealer, check and rewire it
E2 Supply water sensor contact loose/short Contact with the dealer, check and rewire it
E3 Return air sensor contact loose/short Contact with the dealer, check and rewire it
E4 System 1 defrosting sensor contact loose/short Contact with the dealer, check and rewire it
E7 Insufficient water flow
Adjust water flow rate, check and clean
strainer
E8 Water pump overload Contact with the dealer
EA Compressor 1 overload Contact with the dealer
EC Compressor 1 high pressure cutout Contact with the dealer
ED Compressor 1 low pressure cutout Contact with the dealer
EE RAM access failure Contact with the dealer
EF Too low supply water temperature when cooling Contact with the dealer
When other code is displayed, please consult specialized personnel.
See detailed indoor controller operation in corresponding instruction manual.
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