Specifications

64
7
INDOOR UNIT CONTROL
7-1. COOL operation
Control modes
Control details
1-1. Thermoregulating function (Function to prevent restarting for 3 minutes)
• Room temp. ] desired temp. +1:(w2)···Compressor ON
• Room temp. [ desired temp. ···Compressor OFF
Crankcase heater: OFF when compressor operates
ON when compressor stopped
(including when thermo is OFF)
Crankcase heater switches ON when 200V AC current is applied between
connectors CH 1 and 2 on the outdoor control p.c. board.
1-2. Anti-freezing control
Detected condition : When the liquid pipe temp. (TH2 ) or Condenser/
Evaporator temp. (TH5 ) (w3) is 2: or less (w4) in 16
minutes from compressors start up, anti-freezing control
starts and the compressor will be suspended.
Released condition : The timer which prevents reactivating is set for 3 minutes,
and anti- freezing control is cancelled when any one of the
following conditions is satisfied.
1 Liquid pipe temp. (TH2) and Condenser / Evaporator
temp (TH5) turn 10: or above.
2 The condition of the compressor stop has become
complete by thermoregulating, etc.
3 The operation modes became mode other than COOL.
4 The operation stopped.
1-3. Frozen protection
Detected condition : When the indoor pipe temp. (TH2 ) or Condenser/
Evaporator temp.
(TH5 ) continues -15: for 3 minutes since 3 minutes has
passed after the compressor start, the compressor stops
and then the mode changes to prevent restarting for 6
minutes.
After restarting of 6 minutes, when the indoor pipe temp.
(TH2) or Condenser / Evaporator temp. (TH5) continues -15
or less for three minutes again by the time 16 minutes have
passed, the frozen protection operates. (P6)
Released condition : When the operation stops by the remote controller operation.
By the remote controller setting (switch of 4 speeds or 2 speeds)
When determining the abnormality of the pipe temp. low speed fan is fixed.
2. Fan
1. Compressor
Remarks
Refer to w3.
Refer to w4.
w1 The thermoregulating
function is provided in the
outdoor unit.
The indoor unit transmits
the indoor room temp. and
set temp. data to outdoor
unit, then the outdoor unit
controls thermoregulation.
w2 Can be set to 1,5 or
10: using function
selection mode 19.
Number of fan speeds
Fan speed notches
4
2
[Low], [Mid2], [Mid1], [High]
[Low] [High]
w3 Compare liquid pipe temperature to Condenser/ Evaporator temperature, and the lower one is applied to anti-freezing control.
• Liquid pipe temperature [ Condenser/ Evaporator temperature····· Liquid pipe
• Liquid pipe temperature > Condenser/ Evaporator temperature····· Condenser/ Evaporator pipe
w4 The function of remote controller can change the temperature to start anti-freezing control.
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