Mitsubishi Electric CITY MULTI PEFY-P06NMAU-E4 Technical & Service Manual page 28

[ VII Microprocessor Control ]
Chart 1 and Table 4 show an example of heater operation.
Chart 1 [Heater Operation Example]
T
o
T - 0.9 °F [0.5 °C]
o
T - 2.7 °F [1.5 °C]
o
X min
ON
EH1
OFF
ON
EH2
OFF
Table.4 [Heater Operation Example]
Step
(To -T ) > 2.7 °F [1.5 °C]
①
RA
(To -T ) ≤ 2.7 °F [1.5 °C]
②
RA
(To -T ) ≤ 0.9 °F [0.5°C]
③
RA
(To -T ) > 2.7 °F [1.5 °C]
④
RA
(To -T ) > 2.7 °F [1.5 °C]
⑤
RA
(To -T ) ≤ 0.9 °F [0.5°C]
⑥
RA
HWE20150
X min X min
Condition
AND T has not increased by 0.9 °F [0.5°C] in X min
RA
AND T increasing faster than 0.9 °F [0.5°C] in 5 min
RA
AND T has not increased by 0.9 °F [0.5°C] in X min
RA
AND T not increasing faster than 0.9 °F [0.5°C] in 5 min
RA
- 21 -
> 5
min
Result
EH1 ON
EH2 not ON
EH1 OFF
EH1 ON
EH2 ON
EH1 OFF
EH2 OFF
T
RA
GB