Protection Control; Protection Control For All Operations; Total Running Current Control - Panasonic CS-RE18PKR Service Manual

13. Protection Control

13.1

Protection Control for All Operations

13.1.1 Restart Control (Time Delay Safety Control)

The Compressor will not turn on within 3 minutes from the moment operation stops, although the unit is turned on
again by pressing OFF/ON button at remote control within this period.

This control is not applicable if the power supply is cut off and on again.

This phenomenon is to balance the pressure inside the refrigerant cycle.
13.1.2

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 5 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.
Operation Mode
Cooling/Soft Dry (X)
Heating (X)
Y
4 The first 30 minutes of cooling operation, (A) will be applied.
13.1.3 IPM (Power Transistor) Prevention Control
A. Overheating Prevention Control (for RE18PKR, RE24PKR only)
1 When the IPM temperature rises to 120°C (RE18PKR, RE24PKR), compressor operation will stop
immediately.
2 Compressor operation restarts after 3 minutes the temperature decreases to 110°C (RE18PKR, RE24PKR).
3 If this condition repeats continuously 4 times within 20 minutes, timer LED will be blinking ("F96" is indicated).
B. DC Peak Current Control
1 When electric current to IPM exceeds set value of 30.0 ± 5.0A, the compressor will stop operate. Then,
operation will restart after 3 minutes.
2 If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will
restart after 1 minute.
3 If the set value exceeded again within 30 seconds after the compressor starts, the operation will restart after
1 minute. If this condition repeats continuously for 7 times, all indoor and outdoor relays will be cut off, timer
LED will be blinking ("F99" is indicated).
CU-RE18PKR
A 10.07
B 8.82
C 8.05
11.03
15.00
58
CU-RE24PKR
12.48
11.46
10.12
13.54
19.00
CU-RE28PKR
14.86
13.86
13.86
16.51
19.00