Toshiba MMC-P0151H, Руководство по обслуживанию

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3-36
Item
8. Freeze
prevention
control
(Low temp.
release)
Operation explanation and applied data, etc.
(1) In cooling operation, the air conditioner operates as de-
scribed below based upon temp. detected by TC1 and TC2
sensors.
• When “J” zone is detected for 5 minutes, the command
frequency becomes “S0” to the outdoor unit.
• In “K” zone, the timer count is interrupted, and held.
• When “I” zone is detected, the timer is cleared and the
operation returns to the normal operation.
• When the command frequency became S0 with
continua-tion of “J” zone, operation of the the indoor fan
in LOW mode until it reaches the “I” zone.
It is reset when the following conditions are satisfied.
1) TC1
>
12°C and
>
TC2 12°C
2) 30 minutes after the air conditioner has stopped.
Remarks
P
Q
(˚C)
a
K
J
TC1 TC2
P 10 –12
Q 0 –15
9. Cooling
refrigerant/Oil
recovery control
10. Heating
refrigerant/Oil
recovery
control
11. Short intermit-
tent operation
compensation
control
When the indoor units stand by, thermostat is OFF, or the
indoor unit operates with “FAN” mode, PMV of the indoor unit is
opened by a certain degree when the cooling refrigerant/Oil
recovery signal is received from the outdoor unit.
The indoor unit which stops operation, thermostat is OFF, or
operates with “FAN” mode performs the following controls when
the heating refrigerant/Oil recovery signal is received from the
outdoor unit.
1) PMV of the indoor unit is opened by a certain degree.
2) Fan is stopped.
3)Temperature of TC2 is detected, and PMV is closed.
• Only for 4-way ceiling
cassette type, operate the
indoor fan for approx. 3 to 4
min of the recovery operation.
• On the indoor unit in which
thermostat is OFF or which
operates with “FAN” mode,
“PRE-HEAT/DEFROST” go on.
• For 4-way ceiling cassette
type only, operate the indoor
fan for approx. 1 minute after
recovery operation.
(1) For 5 minutes after the operation has started, the operation
is continued even if entering thermostat-OFF condition.
(2) However, if the thermostat has been turned off by changing
the set up temp., the thermostat is OFF with even the above
condition. The protective control has priority.
(1) When the air conditioner stops in the “HEAT” mode, drive
the indoor fan with “LOW” mode for approx. 30 seconds.
(1) During “COOL” operation, the drain pump operates.
(2) When the float SW operates, the compressor stops and the
drain pump operates.
(3) When the operation of the float SW continues for 2 minutes,
a check code is generated.
12. Drain pump
control
CHECK code “0b”
When “0b” occurred, the
outdoor units stop and
“STANDBY” is displayed on the
remote controllers of all the
indoor units.
13. Elimination of
remaining
heat
14. Auto louver
control
(1) When the louver signal has been received from the remote
controller or the central controller, the auto turn louver
operates if the indoor fan is operating.