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10. Fault Indication and Fault Analysis:
Fault No.
Nature of Fault
1
Temperature inside the enclosure
too high
2
Compressor
3
Evaporator
4
High-pressure monitor
5
Condenser fan
6
Evaporator fan
7
Filter monitoring
8
Temperature sensor
9
Phase monitoring
11. Programming (tab. 5.1)
Pro-
Changeable
Min.
gram
Parameter
Value
Level
1
Internal
30
enclosure
temperature T
i
2
Set value of
4
filter mat
monitor
3
Imperial/metric
0
units °C/°F
4
Security code
5
Minimum
20
thermostat
setting
6
Maximum
40
thermostat
setting
7
Alarm setting
3
for enclosure
temperature
8
Setting of
0
PLC interface
9
Turn off of
0
evaporator fan
Cause
Cooling output too low (lack of coolant)
Consequential fault or faults 2 – 7
Compressor overloaded
(internal winding protection)
Defect (check by measuring the resistance
of the winding)
Relay or feed cable faulty
Operational indication if risk of icing up exists
Lack of coolant
Ambient temperature too high
Condenser contaminated
Filter mat contaminated
Condenser fan defective
"E" valve defective
Defective
Blocked or defective
Blocked or defective
Filter mat contaminated
Cable break or short-circuit
Incorrect field of rotation
Max.
Factory
Description
Value
Setting
The standard thermostat setting range is 35 – 45 °C. The upper and lower limits can be
45
35
adjusted through programm level 5 and 6.
40
99
Factory setting is the shut off value (99). To activate:
(99 =
1. Install clean filter mat and let air conditioner cool for a few minutes.
off)
2. Select programm level 2.
3. Push test button 10 seconds. Temperature difference is displayed.
4. Using the "
" button adjust the temperature 2 – 3 K above the displayed value.
The enclosure temperature can be displayed in both °C and °F.
1
0
123
In order to access program levels 5 – 9 the code "123" must first be entered through program
level 4.
The minimum thermostat setting can be adjusted from 35 °C to 20 °C.
35
30
The maximum thermostat setting can be adjusted from 40 °C to 55 °C.
55
45
15
5
Due to the standard factory setting of 5 K the fault code 1 is displayed when the enclosure
temperature is 5 K or more above the thermostat setting. This "alarm temperature" setting can
be adjusted from 3 to 15 °C.
1
0
The factory setting is for serial interface. Parallel interface is activated by selecting 1.
1
0
With the factory setting the evaporator fan turns off for 1 minute each time the unit cycles.
This helps condensate drainage. This feature can be turned off by changing the setting to 1.
Remedy
Check cooling output
Carry out cooling service
Unit will switch on automatically
Replace as part of cooling service
Replace power PCB
Raise the setpoint value of the internal
temperature of enclosure
Carry out of cooling service
Unit's specified range of application exceeded
Clean
Clean or replace
Replace
Carry out of cooling service
Replace as part of cooling service
Replace
Replace
Clean or replace
Replace
Reverse two phases
9
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