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© 2016 Mitsubishi Electric US, Inc.
19
9
HEATER CONTROL
9-1. Control Specifications And Function Setting
• Table 1 shows the mode setting for the field-installed heater.
Table. 1 [Function Table]
Select unit numbers 01 to 03 or all units (AL [wired remote controller] / 07 [IR wireless remote controller])
Mode (function ) No.
Factory Setting
Mode
Heater Operation In
Error
Heater Operation
During Defrost
Fan Control When
Heater ON
Wired remote controller
(RF thermostat)
11 (111)
23 (123)
1
1
Ɣ
No Heater Present
2
1
ņ
Heater Available
OFF
OFF
High
Disable heater during
Defrost and Error
2
2
ņ
Heater Available
ON
ON
High
Enable heater and fan
during Defrost and
Error *1
*1 Heater will not operate during all error modes. Heater will only operate during a communication error between indoor unit and
outdoor unit.
• Table 2 shows how the field-installed heater is controlled.
Table. 2 [Heater Control Table]
Mode Change
Condition
(To -TRA) >
2.7 ° F
[1.5 °C]
AND
TRA has not
increased by
0.9 °F [0.5°
C] in X min
EH1 ON for
> 7 min
AND
(To -TRA) >
2.7 ° F
[1.5 ° C]
AND
TRA has not
increased by 0.9 °
F [0.5° C] in 7 min
(To -TRA) <
0.9 °F
[0.5° C]
EH1 ON
ż
AND
ż
EH2 ON
ż
AND
ż
AND
ż
EH1 OFF
ż
EH2 OFF
ż
KEY
• EH1: Electric Heater 1
• EH2: Electric Heater 2
• To: Set point temperature
• TRA: Return Air temperature
• X: Time delay (Selectable. Default is 24 min. Selectable to 14, 19, or 29 min)
Summary of Contents for M-SERIES
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