Hitachi RAS-E08H2A Service Manual page 29

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td
Heating set temperature
(remote control set temperature
(+))
Dashed period
20min.
Fan speed set to "auto"
Start
Start/Stop button
Thermo judgment
Max.3 min.
Defrost signal
Preheating released
Preheating judgment
Ultra-Hi
Hi
Med
Indoor fan
Lo
Silent
Ultra-Lo
Operarion lamp
60sec.
WMAX2
Max.
Rating
3000
Min.
WMIN
Hi
Outdoor fan
Reversing valve
(Cooling "ON" mode)
Notes:
(1) Condition for entering into Hot Dashed mode. When fan set to "Hi" or "Auto mode" and i) Indoor temperature is lower than 18°C, and ii) outdoor temperature is lower than 10°C,
and iii) Temperature difference between indoor temperature and set temperature has a corresponding compressor speed (calculated value in Table 3) larger than WMAX.
(2) Hot Dashed will release when i) Room temperature has achieved the set temperature + SFTDSW. ii) Thermo off.
(3) During Hot Dashed operation, thermo off temperature is set temperature (with shift value) +3°C. After thermo off, operation continue in Fuzzy control mode.
(4) Compressor minimum "ON" time and "OFF" time is 3 minutes.
(5) During normal heating mode, compressor maximum speed WMAX will maintain for 120 minutes if indoor temperature is higher than 18°C. No time limit constrain if outdoor temperature
is lower than 4°C.
(6) During Hotkeep or Defrost mode, indoor operation lamp will blink at interval of 0.5 seconds "ON" and 0.5 second "OFF".
(7) When heating mode starts, it will enter into Hotkeep mode if indoor heat exchanger temperature is lower than YNEOF + 0.33°C.
(8) When fan is set to
"Lo", compressor speed will be limited to WBEMAX. When fan is set to "Med", compressor speed will be limited to WJKMAX. When fan is set to "Silent",
compressor speed will be limited to WSZMAX.
(9) In "Ultra-Lo" fan mode, if indoor temperature is lower than 18°C, indoor fan will stop. If indoor temperature is higher than 18°C + 0.33°C, fan will continue in "Ultra-Lo" mode.
During Hotkeep or Defrost mode, fan will continue in "Ultra-Lo" mode.
(10) During Hot Dashed, when room temperature reaches set temperature + SFTDSW compressor speed is actual speed x DWNRATEW.
Basic Heating Operation
Stop
Start
Thermo
OFF
Control by
Control by
heat exchanger temperature
heat exchanger temperature
Control by heat exchanger temperature
15sec.
15sec.
Lo
Lo
Lo
Stop
Start
Thermo OFF
Preheating released
Control by heat exchanger temperature
10sec.
15sec.
15sec.
Lo
Table 3 Compressor speed
2200 min
2600 min
3000 min
3400 min
3500 min
3500 min
3500 min
Stop
Thermo
OFF
Control by
heat exchanger temperature
3min.
15sec.
Lo
Calculated
Temperature
compressor speed
difference
(with shift value)
E08H2A
E10H2A
–1
2200 min
–1
1.66°C
–1
2600 min
–1
2.00°C
–1
3000 min
–1
2.33°C
–1
3400 min
–1
2.66°C
–1
–1
3800 min
3.00°C
–1
–1
4200 min
3.33°C
–1
4400 min
–1
3.66°C
Notes:
page 47 & 49 for each constant in
1. See the data in Table 1-Table 2 on
capital letters in the diagrams.
– 27 –

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