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MR810 Technical Manual Revision C REF 185042601
17
5
5.2 SEE MANUAL CODES
When the See Manual Indicator is illuminated the humidifier will switch off the heater plate and heater-
wire. Pressing the Temperature Setting button displays the error code on the Temperature Setting
Indicators, as explained in Table 3.
Table 3: Indicator codes and their meaning
Temperature
Setting
Indicators
See
manual
Indicator
Fault Description Section
Microprocessor failure, replace PCB. 6.4
Button fault. Check buttons are correctly seated. 6.7.1
Heater plate primary thermistor fault (short or open
circuit). Check the thermistor is working correctly,
replace if necessary.
6.5.4
Heater plate secondary thermistor fault (short or
open circuit). Check the thermistor is working
correctly, replace if necessary.
6.5.4
Ambient thermistor fault (short or open circuit),
check heater-wire adaptor, replace if necessary.
6.6
Chamber Sense thermistor fault (short or open
circuit), check heater-wire adaptor, replace if
necessary.
6.6
Heater-wire relay fault (short or open circuit). PCB
faulty, service or replace PCB as necessary.
6.4
Heater control triac error (Heater-wire triac short
circuit or heater plate triac open/short circuit).
Service triac circuitry, replace PCB if necessary.
6.4
Heater-wire Clip Circuit error. Service the
hardware clip circuit, replace PCB if necessary.
6.4
Failed factory production testing. Device should be
returned to your Fisher & Paykel Healthcare
representative.
Temperature Setting Indicator description
Indicator off
Indicator flashing
Indicator on