- 17 -
(2) Display sequence of STATUS code
(Ex.1) When all of three STATUS codes occur simultaneously;
‘ --‘ => ‘-- 1’ => ‘-- 2’ =>
㻌
‘-- 3’ => ‘--1’ …
(Ex.2) When STATUS 1 and 2 occur simultaneously;
‘ --‘ => ‘-- 1’ => ‘-- 2’ =>
㻌
‘-- 2’ => ‘--1’ …
When it elapses 90 seconds or when a unit returns from STATUS condition, chamber
temperature will be appeared on the display.
9. Running
rate
Running rate: Obtained from (ON time / (ON time + OFF time)) x 100%
Definition: “ON time” means the reach time until P3.1 in IC5 is changed “Low” to “Hi”
“OFF time” means the reach time until P3.1 in IC5 is returned “Hi” to “Low”
Condition to measure running rate:
Cycle operation will start when a compressor turns on for the first time after it was
turned off when chamber temperature was lower than set temperature.
Running rate will be measured after 2 hours elapse since the unit was stabilized
in cycle operation.
ON time (Min.) = The time until P3.1 in IC5 first reaches from LOW to HIGH
OFF time (Min.) = The time until P3.1 in IC5 reaches from HIGH to LOW
Condition to calculate running rate:
ON time
OFF time
Running rate
= 0
= 0
> 0
= 0
= 0
> 0
Impossible to calculate
(0%)
> 0
> 0
0 ~ 100%
Note) Running rate cannot be measured when a chamber temperature is higher than set
tempe 4.0
䉝
.
Measuring should be done until a chamber temperature is stabilized.
Diagnosed value of overload running rate:
Step to F20 and input ‘000’.
Chamber
temperature
Set
Compressor turns off
for the first time
Chamber temperature
reaches set temperature.
Compressor turns on
for the first time.
Start to cycle run
2 hours
8 hours
Unit is stabilized in cycle operation.
Start to measure
running rate
Start to measure
running rate
Running rate is measued every 8
hours until chamber temperature is
over set temp4.0
䉝
Summary of Contents for MDF-U55V
Page 14: ...Wiring diagram 11 ...
Page 15: ...Circuit diagram 12 ...
