Service manual

ESIE03–01 Overview of the cooling mode functions
Part 2 – Functional Description 2–31
3
2
4
5
1
Target discharge
pipe temperature
control (Tk)
When changing DS2-4 to ON, also the target discharge pipe temperature control (Tk control) is
changed
By allowing a lower discharge pipe temperature, the expansion valve closing will be limited, hence
avoiding a drastic drop in Low Pressure.
Important remark
when using
"Condition 3"
By changing DS2-4 to ON the integrated capacity increases when the outdoor temperature drops
below 21°C as indicated in the table below :
(*) Relative comparison to indicate a capacity increase of 50~100 % with dip-switch setting ON.
The integrated capacity increases due to the reduction in stand still time after a freeze-up activation.
Careful attention should be taken related to the internal humidity when selecting "conditions 3".
Because of the reduced freeze-up reset conditions an increased risk of frost formation on the indoor
coil or water blowing out of the indoor unit is existing when the indoor humidity exceeds the limits
specified below :
DS2-4 OFF (Factory set) DS2-3 ON (Field set)
When Outdoor Ambient > 12°C : Factory set
condition is applicable (left figure).
When Outdoor Ambient ≤ 12°C :
DIP switch OFF (factory setting) DIP switch ON
Capacity at low temperature 100 % (*) 150 ~ 200 %
Only use the swich DS2-4
in this area
Indoor