Section 9 - Fault Finding
71
Installation and Maintenance
FAUL
T FINDING
9.1.5 Flow Thermistor (Indoor) Fault
9.1.6 Return Thermistor Fault
9.1.7 DHW Thermistor Fault
Is wiring from Indoor Unit Flow Thermistor connections
to the Indoor Flow Thermistor securely connected at
both ends?
Is wiring from indoor unit Return Thermistor connections
to Return Thermistor securely connected at both ends?
Is wiring from indoor unit DHW Thermistor connections
to DHW Thermistor securely connected at both ends?
Disconnect wiring to Indoor Flow Thermistor. Is Outside
Flow resistance OK
(should be 25 Ω at 5 °C & 12 Ω @ 20 °C)?
Disconnect wiring to Return Thermistor. Is Return
Thermistor resistance OK
(should be 940 Ω at 5 °C & 970 Ω @ 20 °C)?
Disconnect wiring to DHW Thermistor. Is DHW
Thermistor resistance OK
(should be 940 Ω at 5 °C & 970 Ω @ 20 °C)?
Replace RVS21 PCB
Replace RVS21 PCB
Replace RVS21 PCB
Connect wiring securely
Connect wiring securely
Connect wiring securely
Replace Indoor Flow Thermistor
Replace Return Thermistor
Replace DHW Thermistor
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
Содержание Logic Air DHW IDEPLUHP180DUOPPSZ
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