Mitsubishi Electric PKA-RP1.6GAL Service Technical Manual page 48

From the previous page.
Control modes
1-6. Discharge temperature over-rise prevention control
1. Compressor
1-7. Condensing temperature over-rise prevention control
1-8. Heat sink temperature over-rise prevention control
2-1. Normal control
2. Fan
N=2
2-2. Correction of fan step according to the outdoor cond./eva. temperature
2-3. Correction of fan step according to the heat sink temperature
2-4. Other
Frequency controls such as Hz-down and no more Hz-up will be conducted
according to the discharge temperature (TH4).
Temperature restriction: No more Hz-up ··· When TH4 detects 105: or more
Hz-down
Frequency controls such as Hz-down and no more Hz-up will be conducted
according to the outdoor condenser/evaporator temperature (TH6).
Temperature restriction: No more Hz-up ··· When TH6 detects 58: or more
Hz-down
Frequency controls such as Hz-down and no more Hz-up will be conducted
according to the heat sink temperature (TH8).
Temperature restriction:
PUHZ-RP1.6VHA
PUHZ-RP2VHA
PUHZ-RP2.5VHA
PUHZ-RP3VHA
PUHZ-RP4VHA
PUHZ-RP5VHA
PUHZ-RP6VHA
W Hz-down amount: -5Hz per minute
Fan rotation times (rpm) will be controlled according to the outdoor outside
temperature (TH7).
• Control method: Inverter control
• Rotation times: Fan step (N) = 0 and 2 to 10
• Compressor start-up: Fan step is fixed to 9 for 30 seconds after the
start-up of compressor.
N=6
N=5
N=4
N=3
-3 0 2 5 7 10 12
Fan step will be corrected according to the outdoor cond./eva. temp.(TH6).
• Correction range of condensing temperature : 19: to 62:
• Correction range of fan step: -1 to +3
Fan step will be corrected according to the heat sink temperature (TH8).
• Correction range of heat sink temperature: 68: to 78:
• Correction range of fan step: 0 to +2
(1) Fan also stops when the compressor is being stopped. (Fan step = 0)
However, fan step will be set to 10 while the compressor is being stopped
due to the abnormal heat sink temperature (Error code = U5).
At this time, the compressor is just waiting for 3 minutes to restart.
Control details
··· -6Hz per min. when TH4 detects 110: or more
··· -10Hz per min. when TH4 detects 118: or more
··· -5Hz per min. when TH6 detects 60: or more
··· -10Hz per min. when TH6 detects 63: or more
Models No more Hz-up
:
78
:
78
:
71
:
71
:
78
:
78
:
78
N=10
N=9
N=8
N=7
15 17 20 22 25 27 30 37
Outside temperature (TH7)
48
Remarks
Hz-down
:
81
:
81
:
74
:
74
:
81
:
81
:
81
Step (N)—Rotation
Step
Rotation times(rpm)
(N)
RP1.6, 2
0 0
1 105
2 135
3 165
4 205
5 265
6 340
7 430
8 530
9 680
10 700
40 [:]
times(rpm)
RP2.5, 3
RP4-6
0 0
95 125
115 155
135 175
165 200
200 240
245 285
305 360
450 465
700 700
720 720