-
234
-
'15 • HM-T-246
4.11 Reference for control PCB replacement
When changing control PCB, make sure to save/transfer below data as following below procedure.
<P rocedure for data save>
Menu
⇒
Service & maintenance(enter the P W)
⇒
Save HP unit setting
⇒
Save setting
※
If the multiple units are connected, all of unit data can be recorded.
<P rocedure for data transfer >
Menu
⇒
Service & maintenance(enter the P W)
⇒
Save HP unit setting
⇒
Transferred the saved data
※
If the multiple units are connected, please select the unit.
※
During operation, this procedure is not allowed.
No. Item Contents
1 Target HW temperature 60
90
℃
2 Accumulated compressor operating time 0
255
3 Accumulated water pump operating time 0
255
4.12 Operation start/stop condition
＜Starting condition of normal operation＞
Actual HW amount（＝ displayed in RC) ＋５％ ＜ Target HW amount
i.e.）If you want to start unit after run out of HW in cylinder, change the P78 value from 5 to 95.
＜Ending condition of normal operation＞
Actual HW amount（＝ displayed in RC) ≧ Target HW amount＋５％
Or
Actual HW amount（＝ displayed in RC) ≧ 100% HW amount level
i.e.）If you want to stop the unit at reached actual HW amount as same as target HW amount, P79 value should be changed from 5 to 0.
Note: When you change P78/P79 value, make sure to record in commissi
oning report or service report.
Target HW amount
Heat pump water heater
operation】（ Start）
【Heat pump water heater
operation Pause】
(Stop)
-５％
※it can be changed
by P78（0〜100）
+５％
※it can be changed
by P79（0〜100）
Actual HW
amount in
Cylinder
＜Example＞
①After reached 100% HW amount, if unit
become inching operation, P78 change from 5 to
moreover may be effective.
②If the temperature sensor is not so many, there
is a
possible to make extra HW. If so, P79 change
from 5 to 0 may be effective.
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