Panasonic CS-E18HKEW, Service Manual, Page: 47 / 70

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13 Protection Control
13.1. Protection Control For All Operations
13.1.1. 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 and on again or after 4-way valve deices condition.
13.1.2. 30 Seconds Forced Operation
1. Once the 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.
13.1.3. 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.
13.1.4. IPM (Power transistor) Prevention Control
A. Overheating Prevention Control
1. When the IPM temperature rises to 110 q C, compressor operation will stop immediately.
2. Compressor operation restarts after three minutes the temperature decreases to 95 q C.
B. DC Peak Current Control
1. When electric current to IPM exceeds set value of 30.0 ± 5.0 A, the compressor will stop operate. Then, operation will restart
after three minutes.
2. If the set value is exceeded again more than 30 seconds after the compressor starts, the operation will restart after two
minutes.
3. If the set value is exceeded again within 30 seconds after the compressor starts, the operation will restart after one minute. If
this condition repeats continuously for seven times, all indoor and outdoor relays will be cut off.
E18HK
Operation Mode X (A) Y (A)
Cooling/Soft Dry (A) 8.8 15.0
Cooling/Soft Dry (B) 7.7 15.0
Heating 10.8 17.0