MDV MDCA3-12HRDN1, Руководство по обслуживанию

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MDCA3-12HRDN1, MDTB1-12HWDN1 and MDFA-12HRFN1, it is 7s) later..
For MDOZU-12HDN1-Q:
For MDOU-12HDN1
Electrical Control Function
Electrical Control System 185
1. Electrical Control Function
1.1 Definition
T1: Indoor room temperature
T2: Coil temperature of indoor heat exchanger middle.
T2B: Coil temperature of indoor heat exchanger outlet.
T3: Coil temperature of condenser
T4: Outdoor ambient temperature
T5: Compressor discharge temperature
Td: Target temperature
1.2 Main Protection
1.2.1 Time delay at restart for compressor.
1.2.2 Temperature protection of compressor top
The unit will stop working when the compressor top temp. protector cut off, and will restart after the
compressor top temp. protector restart.
1.2.3 Temperature protection of compressor discharge
When the compressor discharge temp. is getting higher, the running frequency will be limited as below rules:
：
---Compressor discharge temp. T5>115
℃
for 5s, compressor stops.
---108<T5<115 ℃ , decrease the frequency to the lower level every 3 minutes till F1.
---90<T5<105
℃
, keep running at the current frequency.
----T5<90
℃
, no limit for frequency.
---Compressor discharge temp. T5>115
℃
for 5s, compressor stops and restarts up till T5<90
℃
---110<T5<115 ℃ , decrease the frequency to the lower level every 2 minutes.
---105<T5<110
℃
, keep running at the current frequency.
----T5<105
℃
, no limit for frequency.
For other models:
----If 102
℃
<T5<115
℃
, decrease the frequency to the lower level every 2 minutes till to F1.
---If T5>115
℃
for 10 seconds, the compressor will stop and restart till T5<90
℃
.
1.2.4 Sensor protection at open circuit and breaking disconnection.
1.2.5 Indoor fan delayed open function
----When system starts up, the louver will be active immediately and the indoor fan will open 10s (for
----If the system runs in heating mode, the anti-cold wind function has priority.
1.2.6 Fan speed is out of control (Only for Console)
When Indoor fan speed keeps too low (300RPM) for certain time, the unit will stop and the LED will display
the failure