Service manual

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Normal operation
Discharge pipe
temperature
standby
INV Comp. upper
limit step:
1-step down
INV Comp. upper
l
imit step:
1-step up
• HTdi<100°C
• Tp<110°C
• NV upper limit step=max (Max. step)
• HTdi<110°C
• Tp<125°C
• HTdi>115°C
• Tp>135°C
• HTdi>115°C
• Tp>135°C
In control of discharge pipe temperature protection
• HTdi>130°C
• HTdi>120°C continues for 90 seconds or
more.
• HTdi>135°C
• HTdi>120°C continues for 10 minutes or more.
When occuring 3 times within 100 min.,
the malfunction code “F3” is output.
52Hz+OFF+OFF
Frequency agreement
After 30 sec.
After 20 sec.
or
HTds: Value of STD compressor discharge
pipe temperature (Tds) compensated
with outdoor air temperature.
Tp : Value of compressor port temperature
calculated by Tc and Te, and suction
superheated degree.
• HTds>120°C continues for 5 min. or more.
• HTds>135°C
• Tp>135°C continues for 10 min. or more.
Discharge pipe temp.
protection control not limited
After 10 min.
Applicable STD
compressor stops.