| Maintenance Item |
Frequency |
Work Details |
Notes |
(1)
Pressuremeter |
Daily |
Inspect to see if pump pressure has changed or if needle shifted by more than 0.5Mpa.
|
| |
If abnormality if found, stop unit. |
|
(2)
Coupling (piping) |
Check water/oil leak. |
| |
Inspect unit, hoses, couplings, metal couplers during leak checks. |
| |
If leaks are found, tighten. If leaks persist, replace parts. |
|
(3)
Temperature Controller |
Check to see if medium is running under temperature set in temperature controller. |
|
(4)
Strainer |
Weekly |
After closing supply main valve of customer equipment, remove plug and clean strainer. |
|
(5)
Medium (water)
L, H Types |
Montly |
Collect proper amount of medium from drain outlet and inspect degree of contamination. |
| |
If badly contaminated, set receive container under drain outlet, release medium and replace. |
|
(6)
Medium (oil)
A Type |
Release oil from unit and check contamination. |
| |
If used in high frequency, replace monthly. But if used in low freq., replace every 6 months. |
|
(7)
Hose |
Check to see if medium is leaking from medium. Also see if hose is not deformed (crushed, expanded) , damaged on outside, cracked, worn or badly hardened. |
| |
Replace if leaking due to scratching. |
| |
Hose will wear, deteriorate rapidly 20 degrees C below the temperature range specified below*. |
| |
If abnormality is found at time of inspection, replace immediately. |
| |
If the following hoses are used temperature, replace temperature, replace within one year (1.5 yrs for teflon hoses) |
|
| * |
Specified Temperature |
| |
L, LL rubber hose:
(warm water) 95 degrees C |
|
H rubber hose:
(warm water) 120 degrees C |
|
Teflon grade hose: (warm water, oil) 200 degrees C |
|
(8)
Pump Drain
(mechanical) |
Remove left board of unit and clean medium in drain. |
[Note]
Due to the way it is set up, drain seal cannot completely seal medium.
May see 4,5 drop leaks hourly. |
|
(9)
Floatless Switch
L, H Types |
3 Months |
Remove lid. Then check the contamination of switch and whether floatless runs smoothly Clean if contaminated. |
|
(10)
Float Switch
A Types |
Remove lid. Then check the contamination of switch and whether float runs smoothly Clean if contaminated. |
| |
Replace if float is deformed and does not run smoothly. Also, replace O-ring on lid if deformed or hardened to the point of breaking. |
| |
Do not remove snap ring below float. |
|
(11)
SSR
(Solid, State, Relay) |
With power breaker of unit on (power lamp blinking), turn operation off, use clampmeter to measure current on heater circuits.
|
| |
Current to heater circuits should not be running if heater conductor is normal under conditions mention on left. If current is running, SSR is damaged. Please replace. |
|
(12)
Terminals |
Remove top board on unit. Open the control panel and check if hook-ups to connections on any electrical unit is loose. Tighten connections if loose. |
| |
Before inspecting, stop unit and turn power breakers off (on side of unit). |
|
(13)
Bolts/Nuts |
Check looseness on any bolt or nuts. Tighten if loose. |
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