Protection Control; Protection Control For All Operations - Panasonic WH-MDC05F3E5 Service Manual

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.
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.
13.1.3 Total Running Current Control
1 When the Mono bloc unit running current exceeds X value, the compressor frequency will decrease.
2 If the Mono bloc unit running current does not exceed X value, the compressor frequency will return to
normal operating frequency.
3 If the Mono bloc unit running current continue to increase till exceed Y value, compressor will stop, and if this
occurs 3 times within 20 minutes, system will stop operation and OFF/ON remote control LED will blink (F16
error occurs).
Heating
Cooling
13.1.4 IPM (Power transistor) Prevention Control
A. Overheating Prevention Control
1 When the IPM temperature rises to 95°C, compressor will stop immediately.
2 Compressor will restart delay 3 minutes when the IPM temperature decreases to 90°C.
If this condition repeats continuously 3 times within 30 minutes, system will stop operation and OFF/ON
remote control LED will blink (F22 error occurs).
B. DC Peak Current Control
1 When the current to IPM exceeds set value of 39.0 ± 5.0 A, compressor will stop. Compressor will restart
after three minutes.
2 If the set value exceeds again for more than 30 seconds after the compressor restarts, operation will restart
after two minutes.
3 If the set value exceeds again for within 30 seconds after the compressor restarts, operation will restart after
one minute. If this condition repeats continuously for seven times, system will stop operation and OFF/ON
remote control LED will blink (F23 error occurs).
13.1.5 Compressor Overheating Prevention Control

The compressor operating frequency is regulated in accordance to compressor tank temperature as shown in
below figures. When the compressor tank temperature exceeds 112°C, compressor will stop, and if this occurs
4 times within 30 minutes, system will stop operation and OFF/ON remote control LED will blink (F20 error
occurs).
Operation Mode
MDC05F3E5
X (A)
15.5
7.7
76
Y (A)
16.5
16.5