Mitsubishi Electric PEAD Series Service Manual page 30

HEATER CONTROL
• Table 2 shows how the field-installed heater is controlled.
Table. 2 [Heater Control Table]
Mode
Change
(To -T RA ) >
EH1 ON
2.7 ° F [1.5 °C]
(To -T RA ) >
EH2 ON
2.7 ° F [1.5 ° C]
EH1 OFF
(To -T RA )
0.9 °F [0.5° C]
EH2 OFF
KEY
• EH1: Electric Heater 1
• EH2: Electric Heater 2
• To: Set point temperature
• T RA : Return Air temperature
• X: Time delay (Selectable. Default is 20 min. Selectable to 10, 15, or 25 min)
• Table 3 shows how the time delay is selected
Table. 3 [Time Delay Selection Table]
*1
Request Code
390
391
392
393
394
*1 Time delay can only be selected with MA controller. If use of a non-MA controller is desired, the time delay must first be
selected with the MA controller. Then the non-MA controller can be attached and used.
*2 The default time delay setting is 20 minutes.
*3 All delay times are approximate.It takes a few minutes to turn heater ON after the heater ON delay time has passed.
HWE2109A
Condition
T RA has not
increased by
AND
0.9 °F [0.5°C]
in X min
T RA has not
increased by
AND
0.9 °F [0.5°C]
in 8 min
≤
*3
Action
Monitor Time Delay Setting
Set Time Delay to 10 minutes
Set Time Delay to 15 minutes
Set Time Delay to 20 minutes
Set Time Delay to 25 minutes
EH1 ON for
AND
> 8 min
Notes:
1. Both main and sub unit should be set in the same
setting.
2. Every time replacing indoor controller board for
serving, the function should be set again.
3. Stop the air-conditioner operation before changing
the heater ON delay time.
*2
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