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6. Short intermittent operation preventive control
1) For 3 to 10 minutes after operation start, in some cases, the compressor does not stop to protect the
compressor even if receiving the thermostat-OFF signal from indoor.
However it is not abnormal status. (The operation continuance differs according to the operation status.)
2) When the operation stops by the remote controller, the operation does not continue.
7. High pressure restraint TE control
1) Control to restraint abnormal rising of high pressure in cooling operation
2) Stop the compressor at TE ≥ 67°C and the error is counted by 1.
3) After 2 minutes and 30 seconds, if TE < 67°C, restart the compressor.
When the operation continues for 10 minutes, the error count is cleared.
4) If TE ≥ 67°C was detected again within 10 minutes, add 1 to the error count and then repeat to restart
the compressor.
5) When the error count 10 is detected, determine it as an error.
Do not restart the compressor. The error “P04” is displayed.
6) After restart of the compressor, control the current release by lowering control value by 70% to 90% for
minimum 30 minutes or more.
8. Over-current protective control
1) When the over-current protective circuit detected an abnormal current, stop the compressor.
2) Restart the compressor 2 minutes and 30 seconds after the error count 1 was indicated.
3) When the error is determined as the error count 8, do not restart the compressor.
The error display is “H01”, “H02” or “P26”.
9. Current release value shift control
1) This control purposes to prevent trouble of the electronic parts such as G-Tr, etc of the inverter in the
compressor driving system and trouble of the compressor.
2) This control corrects the current release control value (11) of item 3. by TO sensor value.
3) The correction amount is based on the following control diagram and correction amount table.
Correction amount
T
a
b
c
d
SM160
39°C
60
70
80
90
T + 8
I1 × a %
I1 × b %
I1 × c %
I1 × d %
Remains as I1
T + 7
T + 5
T + 4
T + 2
T + 1
T
T – 1
TO [˚C]