Mitsubishi Electric PVFY-P12 Service Manual page 26

• Chart 1 and Table 4 show an example of heater operation.
Chart 1 [Heater Operation Example]
T - 0.9 °F [0.5 °C]
o
T - 2.7 °F [1.5 °C]
o
EH1
EH2
③
Table. 4 [Heater Operation Example]
②
Step
③
①
(To -T RA ) > 2.7 °F [1.5 °C]
⑥
②
(To -T RA ) < 2.7 °F [1.5 °C]
X min X min
③
(To -T RA ) < 0.9 °F [0.5°C]
①
④
(To -T RA ) > 2.7 °F [1.5 °C]
⑤
② ②
④
⑤ (To -T RA ) > 2.7 °F [1.5 °C]
X min X min
X min
① ①
(To -T ) < 0.9 °F [0.5°C]
⑥
RA
X min
⑤
Specifications are subject to change without notice.
T
o
③
②
①
X min
ON
OFF
ON
OFF
⑥
Condition
⑥
⑥
AND T RA has not increased by 0.9 °F [0.5°C] in X min
④
⑤
AND T RA increasing faster than 0.9 °F [0.5°C] in 5 min
T
RA
③
T
RA
④
AND T RA has not increased by 0.9 °F [0.5°C] in X min
⑤
AND T RA not increasing faster than 0.9 °F [0.5°C] in 5 min
④
X min
T
RA
③
②
①
X min X min
T
RA
T
RA
⑥
⑤
24
⑥
④
⑤
> 5
min
Result
EH1 ON
EH2 not ON
EH1 OFF
EH1 ON
T
RA
EH2 ON
EH1 OFF
EH2 OFF
© 2017 Mitsubishi Electric US, Inc.
T
RA