Protection Control; Protection Control For All Operations - Panasonic CS-E7PKEW Service Manual

15. Protection Control

15.1 Protection Control For All Operations

15.1.1 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.
15.1.2 Total Running Current
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.
Model
Operation Mode
Cooling / Soft Dry (A)
Cooling / Soft Dry (B)
Heating
Cooling/Soft Dry (A)
Cooling/Soft Dry (B)
4 The first 30 minutes of cooling operation, (A) will be applied.
E7/9/12/15/21/24PK
15.1.3 IPM (Power transistor) Prevention Control
•
Overheating Prevention Control
1 When the IPM temperature rises to 110°C (E28PK) and 120°C (E7/9/12/15/24/24PK), compressor operation
will stop immediately.
2 Compressor operation restarts after 3 minutes the temperature decreases to 95°C (E28PK) 110°C.
3 If this condition repeats continuously 4 times within 20 minutes, timer LED will be blinking ("F96" is indicated).
•
DC Peak Current Control
1 When electric current to IPM exceeds set value of 16.0 ± 2.0A (E7/9/12/15PK) and 30.0 ± 3.0A
(E18/21/24/28PK), 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).
E7PKE E9PKE
X (A) Y (A) X (A)
3.69 15.06 4.54
3.24 15.06 4.12
4.20 15.06 5.49
Model
Operation Mode
Heating
E12PKE
Y (A) X (A) Y (A)
14.98 6.57 14.91
14.98 6.13 14.91
14.98 7.23 14.91
E24PKE
X (A) Y (A)
14.39 19.05
11.78 19.05
12.75 19.05
100
E15PKE E18PKE
X (A) Y (A) X (A) Y (A)
7.96 14.91 11.81 14.75
7.45 14.91 8.91 14.75
8.18 14.91 10.07 14.75
E28PKE
X (A) Y (A)
14.82 19.05
13.7 19.05
14.91 19.05
E28PK
E21PKE
X (A) Y (A)
12.27 14.75
11.1 14.75
11.81 14.75