Hanshin Machinery GRH 3 series, Руководство пользователя

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49M2(main motor overload relay)
During
operation
When
trip
R
S
T
51
6-1 Protective Devices and LCD Message List
1. Protective Devices
The following protective devices are contained to protect the compressor against dangerous situation and the
measures should be taken by referring the functions.
2. Trip, Alarm LCD Messages
Alarm display [compressor operation]
If the following messages are displayed, immediately replace the filters and check them.
63A(pressure switch for internal pressure detection) 49M1 (Fan motor overload relay)
Internal pressure(P1) Connection
Operation
It detects internal
pressure and disables the
operation in case of 2.0
and lower pressure
Contact point(A/B)
On : 2.0 bar and higher
Off : 2.0 bar and lower
Crrent
setting
lever
Operation
If excessive current is
allowed, the compressor
stops due to fan motor
overload.
Contact point
Normal : 97-98 off
Overload : 97-98 on
Detection
Use time
Use time
Use time
Temp. sensor
63A
NO
1
2
3
4
5
Micom LCD Display
AIR F. CHANGE
OIL F. CHANGE
SEPARATOR CHANGE
DISCHARGE TEMP. HIGH
P1 LOW-LOW
Measure
Reset the time after replacing air filter
Reset the time after replacing oil filter
Reset the timer after replacing separator
Check oil level and clean up the cooler
Adjust internal pressure adjustment valve
Measure
95~109
Trip display[compressor stop]
If the following messages are displayed, check the accurate trip location, take a measure and restart the compressor.
Detection
49M1
49M2
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Temp. sensor
Temp. Sensor
Pressure sensor
49M3
WFS
NO
1
2
3
4
5
6
7
8
Micom LCD Display
FAN MOTOR OVERLOAD
MAIN MOTOR OVERLOAD
ANSWER SIGNAL OFF
DISCHARGE TEMP 110 OVER
T-SENSOR TROUBLE
P-SENSOR TROUBLE
REVERSE PHASE
WATER FLOW ERROR
Measure
Check fan motor and electric wiring
Check 49M2 and main motor
Check operation signal
Check oil level and clean up the cooler
Check temp. sensor and wiring
Check pressure sensor and wiring
Lead-in power reverse phase
Coolant level and pro switch
Remarks
EMPR
Magnet
EMPR
6. Troubleshooting
GRH3 star-delta
User’s Manual
RC(A) knob
- Set the operating current
Time knob
- Set the operating time
O.L./Fault LED
- LED working according
to each different condition
Test/Reset
- Check the normal working
condition of button output
contacts
Condition
Normal operation
Over current before shutdown
Phase unbalance (30~50%)
Over current after shutdown
Open phase (3CT)
Open phase (2CT)
Reverse phase (3CT)
LED working condition
Light out
Red light flickering every 0.4 second
Green light flickering every 0.4 second
Red light on
Green light flickering one time every 3 seconds with red light on
Green light flickering two times every 3 seconds with red light on
Green light flickering three times every 3 seconds with red light on
Red light on for 0.9 second / Red light out only for 0.1 second
Red light and green light flickering by turns