Panasonic CU-E12GFE

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9.14. Dew Prevention Control
a. Purpose
To prevent dew.
b. Control start conditions
When indoor units are ceiling floor, duct and mini-cassette.
c. Control contents
Hz control is carried out according to the dew prevention status transmitted from indoor.
Change is once to 10 seconds.
* Once the stand-up went into the down domain by Fcmax as for the Fcmax domain, it shifts to relative changes control domain.
When the higher rank of relative control has this control and the status signal od 2-3 has come out.
Relative change control is stopped and follows directions of spray control.
Priority is given to the which is larger when freeze prevention down status and dew prevention down status are transmitted
simultaneously.
In the case of dew prevention status 0, it is referred to as maxFc.
9.15. Protection Control Features
9.15.1. Protection Control For All Operations
9.15.1.1. Time Delay Safety Control
1. The compressor will not start for three minutes after stop of operation.
2. This control is not applicable if the power supply is cut off for 20 seconds and on again or after 4-way valve deices condition.
9.15.1.2. 30 Seconds Forced Operation
1. Once compressor starts operation, it will not stop its operation for 30 seconds.
2. However, it can be stopped using remote control or Auto Switch at indoor unit.
9.15.1.3. Total Running Current Control
1. When the outdoor unit total running current (AC) exceeds X value, the frequency instructed for compressor operation will be
decreased.
2. If the running current does not exceed X value for five seconds, the frequency instructed will be increased.
3. However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for 3 minutes.
4. The first 30 minutes of cooling operation, (A) will be applied.
D ew p re v en t io n
status (transmitted indoor)
Control contents
Relative control domain MAX domain
0 (it usually controls) Usually, control Usually, control
1 (rise) Relative change control priority On tap up/10 seconds
2 (changeless) Changeless Changeless
3 (down) -2 Hz/10 seconds -2 Hz/10 seconds
Model CU-E9GFE CU-E12GFE CU-E18GFE
Operation Mode X (A) Y (A) X (A) Y (A) X (A) Y (A)
Cooling/Dry (A) 4.0 16.8 5.4 16.8 8.74 17
Cooling/Dry (B) 3.6 16.8 5.0 16.8 7.70 17
Heating 5.5 16.8 8.4 16.8 10.71 17