Fault Code 64

Fault: Malfunction of indoor air thermistor (Heat reclaim ventilator)
Defective connector contact
Defective indoor air thermistor
Defective control PCB
 

For Daikin split and multi-split air conditioning systems included wall-mounted, duct-connected, floor-standing, multi-flow, stylish, european, ururu sarara & cassette-type units.
If molded case circuit breakers or earth leakage circuit breakers have tripped, do not reset the breaker immediately without first checking for any problems with insulation of equipment.
Resetting breakers without a check of insulation may cause damage to equipment.