Mitsubishi Electric City Multi PUHY-HP144TSHMU-A, Руководство по обслуживанию

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[
VII
Control ]
- 85 - HWE0716A GB
(3) Bypass solenoid valve (SV6) (ON = Open)
If outdoor temperature (TH7) during heating operation is between 3°C[37°F] and 5°C[41°F] , ON or OFF.
(4) Bypass solenoid valve (SV9) (ON = Open)
Operation
SV6
ON OFF
During cooling operation ON
During heating operation (outdoor tempera-
ture (TH7) is 5°C[41°F] and above) Always ON except for the defrost cycle.
During heating operation (outdoor tempera-
ture (TH7) is 3°C[37°F] or below) OFF when 1 minute has passed since compressor startup.
Operation
SV9
ON OFF
After resuming operation after the comple-
tion of the defrost cycle ON for 5 minutes.
At NO1 compressor startup (outdoor tem-
perature: -15°C[5°F] or lower) or after re-
suming operation after the completion of the
defrost cycle(outdoor temperature:
-15°C[5°F] or lower) ON when 5 minutes or less have
passed and 63HS1 or 2 < 1.76MPa
[255 psi]. OFF when 5 minutes or more have
passed or 63HS1 or 2
1.76MPa
[255 psi].
When the compressor stops at cooling/heat-
ing mode ON for only 5 minutes in 1 hour.
During heating operation, during compres-
sor frequency Fmin operation, and when
high pressure (63HS1 or 2) rises When 63HS1, 63HS2 exceeds
3.43 MPa [497 psi]. When 30 seconds have passed,
compressor frequency Fmin +10 or
more, and 2.65MPa [384 psi] or
less.