Criteria For Indoor Air Inlet/Outlet Temperature Difference; Criteria Of Operation Current Value; Criteria Of Operation Pressure - Toshiba HFCR407C Service Manual

NOTE 1:

Criteria for indoor air inlet/outlet temperature difference

After operation for a minimum of 30 minutes in "COOL" mode, if temp. difference between the air inlet and air
outlet of the indoor unit is 8°C or more – operation is normal.
(In Max. Hz operation)
• The difference in temperature between the air inlet and air outlet decreases when the total number of
indoor units connected, exceeds 100% of the system capacity, or when the pipe length exceeds
specification.
NOTE 2:

Criteria of operation current value

In cooling operation, when the current is within ± 15% of the specified current value, the system is operating
normally.
(COOL Max. Hz operation)
The current value differs as described below according to the operation conditions.
• Greater than the specified current
(1) Temp. in indoor/outdoor is high.
(2) Radiation of outdoor unit is bad.
• Less than the specified current
(1) Temp. in indoor/outdoor is low.
(2) Gas leakage. (Insufficient refrigerant amount)
NOTE 3:

Criteria of operation pressure

COOL/HEAT
NOTE: Measurement taken 15 minutes after operation start (db = Dry bulb temp. °C).
Trial operation
Procedure and summary of trial operation
High pressure 16 to 22 kgf/cm
Low pressure 3.5 to 5.5 kgf/cm
G Indoor 18 to 32 °C db
2
2 G Outdoor 25 to 35 °C db
135
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