user manual

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Section
– 34 –
SM830076
2. Processes and functions
2-8 Discharge Temperature Control (Cooling and Heating)
This function prevents the compressor motor from burnout by overheating.
Fig. 11
Chart Summary and Explanations
❑ Discharge temperature is sensed by TH8 (discharge gas sensor).
❑ When the temperature rises above 203°F the electronic refrigerant control valve opens at
50 steps/30 seconds until the temperature falls below 200°F.
❑ During HEATING operation, when the temperature rises above 221°F, the control circuit
stops the outdoor fan motor until the temperature falls below 194°F. Please note that this
control does not function during COOLING operation.
❑ For both COOLING and HEATING modes, if the temperature reaches 239°F the operation
shuts down and alarm P3 appears on the remote controller.
❑ The outdoor fan speed is controlled on discharge temp. at heating mode.
OUTDOOR
FAN SPEED
DISCHARGE GAS
TEMP. (°F)
239
221
203
200
194
185
COMPRESSOR
ELECTRONIC REF.
CONTROL VALVE
(DISCHARGE TEMP.)
TRIP IS OPERATED.
H OR M
M
1141_THS_I
OPENOPEN
H OR M
ON