Model reference
Denso CLASSIC40
Air Conditioner
1 document7 error codes3 service modes
Available documentation
Service Manual
- Service Manual Classic 4074 pg
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Error codes (7)
CodeMeaning
ALDetection of unit stop signal from fire alarm systemCFLoss of cooling detectionE1Room thermistor connection problemE2Freeze protection thermistor connection problemE4Activation of protective deviceFLOvercurrent relay (thermal relay) protection activatedHPActivation of high pressure switchService modes (3)
- Diagnostic code resetHold down the SET TEMP UP and SET TEMP DOWN buttons simultaneously for at least 3 seconds.
- Temperature display mode change (°C / °F)Hold down the SET TEMP UP, SET TEMP DOWN, and FAN buttons simultaneously for at least 3 seconds.
- Wall thermostat connection mode1) Press and hold FAN button, SET TEMP UP and SET TEMP DOWN buttons simultaneously to activate wall…
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