Midea MT-200R20E20 - Maintenance; Pre-Operation Checks; Troubleshooting Abnormal Situations

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8 MAINTENANCE
8.1Conrmationbeforerunning
1)Makesurewhethergroundwireisbrokenorfallo󰀨.
2)Poweronthemachineafterallconnectionsarequalied.
8.2Troubleshootingwhenabnormalsituationhappens
Before asking for serving or repairing, check the following points:
• Non-mechanical malfunction
1) Water oozes from safety valve pressure relief opening
 -Whenwaterheating,coldwaterwillexpandwhenheated,wateroozingisnormal.Donotblockitforsafetyconsideration.
 -Ifalargeamountofwaterows,itmeanssafetyvalveisinvalid.Stopusingandreplacesafetyvalve.
2) Long period for heating a tank of water
 -Inwinter,waterheatinge󰀩ciencywilldecreasebecauseoflowambienttemperature(about0°C).Itwilltakealongertimefor
water heating.
- If customer needs to use hot water, please start the unti in advance.
• Need to check
1) Automatically start or stop
- Whether we set timer wrongly. 2) When not working
- Check whether powering on.
- Whether manual switch is on.
- Whether fuse blows.
- Whether start the protection device (indicator lights).
- Whether it is not the time of timer on. (Operation lamp lights.)
3)Ifheatinge󰀨ectisnotgood
- Whether air outlet and inlet has been blocked.
• Ifthefollowingsituationhappens,pleasestoprunningandcuto󰀨powersupplymanuallyandcontactwiththedealer
or service center.
-ON/OFFoperationisine󰀨ective.
- Fuse or RCCB trips frequently
• Before leave unused for a long time, please complete the following items:
- Drain water from tank and pipes, close all valve bodies.
• After leave unused for a long time, please check the following items:
- Check air inlet and outlet of the unit to see whether they are blocked. Clean immediately when they are blocked.
- Check whether water pipes, valves have been damages or blocked. Whether there’s water leakage in joints,
replace them wwhen water leaks.
-Itissuggesttoinspectanodeprotectionmaterialeveryhalfyear.Ifithasbeenexhausted,pleasereplaceitwith
a new one.
CAUTION
8.3 After-sale service
Incaseofmalfunctions,pleasecuto󰀨thepowerswitchandcontactafter-saleservicecentreortechnicalservicedepartment,for
detailed information please refer to User Service Guide.
8.4 Important information for the used refrigerant
Thisproducthastheuorinatedgas,itisforbiddentoreleasetoair.
Refrigerant type: R134a; Volume of GWP: 1430;
GWP=Global Warming Potential
Table 8-1
Factory charge
Refrigerant/kg tonnes CO
2
equivalent
0.9 1.29