Panasonic OCU-R200SF, Руководство по обслуживанию

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⑴ ⑴ Reconfirm that there are no alarms or loosen connection in wiring.
⑵ ⑵ Open all the service valves to full extent with a ratchet wrench.
⑶ ⑶
Confirm that power-supply voltage falls within ±10% of rated voltage.
⑷ ⑷
For three phase power supply, confirm the correct phase sequence. Never start the unit by manual clicking the contactor.
⑸ Check whether the insulation resistance is over 1M Ω .
⑴ 高压压力开关
High Pressure Switch
Follow below setting strictly.
⑵ 低压压力开关
Low Pressure Switch
CUT OFF ＝ RANGE － DIFF
⑶Setting of Low Pressure Switch by Applications
Page
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When starting the unit after turning off the earth leakage breaker, activate the crankcase heater for more than six hours before
starting the compressor. This is to prevent oil foaming during start process.
（ Turn off the operation switch located on the body
of the unit. Wait six hours while turning on an earth leakage breaker. After this, turn on the operation switch)
(RANGE) (DIFF) (CUT OFF)
The above settings are only used as a reference for pressure setting at a specific temperature. Appropriate adjustments should
be made according to different systems and operating temperatures to ensure normal on-off of compressor and performance.
The low-voltage switch must be setted to ensure that the compressor is not operating under negative pressure.
R22
-30
～
-22
℃
Freezer, Ice Cream
-45
～
-40
℃
0.08 0.08 0.00
R404A
Ref.
Showcase
Temperature
Applications
Evaporating
Temperature
Setting of LPS (MPa)
(RANGE) (DIFF) (CUT OFF)
Check Points and Settings for Operation
Points to be confirmed before starting
Ref.
Showcase
Temperature
Applications
Evaporating
Temperature
Setting of LPS (MPa)
Power for crankcase heater
（
option accessory
）
-5 ～ 0 ℃
Meat, Fish
-10 ℃
0.19 0.10 0.09
-8
～
-5
℃
Fast-frozen food -30
～
25
℃
0.14 0.08 0.06
+3 ～ +10 ℃
Rfrigerator
-5 ℃
0.45 0.20 0.25
-2 ～ +10 ℃
Vegetables, Fruits
-8 ℃
0.35 0.10 0.25
-22
～
-8
℃
Frozen meals, ice cream -40
～
-35
℃
0.10 0.10 0.00
+20
～
+10
℃
Fruits
10
～
0
℃
0.55 0.30 0.25
-5 ～ 0 ℃ Meat, Fish -10 ℃
0.26 0.21 0.05
-8 ～ -5 ℃ Fast-frozen food -30 ～ -25 ℃
0.20 0.17 0.03
+3
～
+10
℃
Rfrigerator -5
℃
0.40 0.20 0.20
-2 ～ +10 ℃ Vegetables, Fruits -8 ℃
0.30 0.10 0.20
Note: after the connection of the leakage protector, crankcase heater is heated by electricity, so please do not directly
touch!
Refrigerant
R22 R404A
Setting
2.65MPa 2.78MPa
+20
～
+10
℃
Fruits 10
～
0
℃
0.50 0.30 0.20
Setting of pressure switches
Low pressure CUT OFF value can be set according to the purpose by adjusting
RANGE screw and DIFF screw.Please avoid negative pressure operation.
The on-off relationship of the low-pressure side is as follows: