Deice Control; Time Delay Safety Control (Restart Control); Seconds Force Operation; Total Current Control - Panasonic CU-5E36QBU Service Manual

13.8 Deice Control


When outdoor pipe temperature and outdoor air temperature is low, deice operation starts where indoor fan
motor and outdoor fan motor stop, indoor unit horizontal vane close and operation LED blink with compressor ON.

13.9 Time Delay Safety Control (Restart Control)


The compressor will not restart within three minutes after compressor is stopped.

This control is not applicable if the power supply reset or after deice condition.

13.10 30 seconds Force Operation


Once the compressor starts operation, it will not stop its operation for 30 seconds in order to cycle back
compressor oil.

However, it can be stopped using remote control or Auto OFF/ON button at indoor unit.

13.11 Total Current Control


By referring to table below, during normal (default) operation, the running current refer to Hi values and during
Power Save Mode, the running current refer to Lo values.

When the outdoor unit total running current (AC) exceeds X value, compressor frequency will decrease.

If the running current does not exceed X value for 5 seconds, compressor frequency will increase.

However, if total outdoor unit running current exceeds Y value, compressor will be stopped immediately for
3 minutes.

The first 30 minutes of cooling operation, (A) will be applied.

13.12 IPM (power transistor) Protection Control


Overheating Prevention Control
If IPM temperature rises to 176°F (80°C), outdoor fan speed will be increased.
o
When the IPM temperature rises to 203°F (95°C), compressor operation will stop immediately.
o
Compressor operation restarts when temperature decreases to 194°F (90°C).
o
If IPM temperature detected less than -22°F (-30°C), IPM is judged as open circuit ("F96" is indicated).
o
Operation Mode
Hi
Cooling/Soft Dry (A)
Lo
Hi
Cooling/Soft Dry (B)
Lo
Hi
Cooling/Soft Dry (C)
Lo
Hi
Heating
Lo
CU-5E36QBU
X (A) Y (A)
19.43
13.56
17.32
13.56
23.07
17.32
13.56
20.06
14.03
27