ZYMBO AATT Ventilarredo RX-200/ECO, Руководство по обслуживанию

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ZYMBO AATT
Ventilarredo Service Manual – English Pag. 68
Low temperature protection of indoor coil
1) If Ti1(Chilled water coil temperature exchanger temperature)
≦
2 ºC for 2 minutes, AUX2 (Cold
water free contact) is off. Indoor fan runs at Max speed.
2) Above point is necessary to supply max warm coming from room air to water inside exchanger to
avoid water can freeze and broken pipes exchanger.
3) Display Flash Alarm E7
4) If Ti1(Chilled water coil temperature exchanger temperature)
≧
5 ºC for 2 minutes, AUX2 (Cold
water free contact) is on. Indoor fan runs at set speed, no alarm code.
7.4.1.2 Fan mode
1) Indoor fan runs at the set speed while AUX1(Hot water free contact), AUX2(Cold water free contact),
are turned off.
2) Indoor fan speed can be adjusted with 6 speeds
3) No possible to set Ts, LCD only display room temperature.
4) For two-Pipes system without motorized valve, when slave unit is working with Fan mode, but master
unit is working with Cooling/heating mode, slave unit would display E9 as Mode fault.
7.4.1.3 Heat mode
When unit is selected with cool only mode(PR1 setting), heat mode would be invalid.
Heat mode
1) AUX2(Cold water free contact) is always off.
2) If Tr(Room air temperature) <= Ts(Setting temperature)
﹣
1 ºC, heat operation is activated,
AUX1(Hot water free contact) is turned on. Indoor fan runs with Pre-heat function.
3) If Tr(Room air temperature) >Ts(Setting temperature), heat operation is terminated, AUX1(Hot water
free contact) is turned off. No Post-heat function.
4) The range of Ts is 5 °C~30 ºC. If PR setting is activated, Ts range is same as PR setting.
5) Indoor fan speed can be adjusted with 6 Auto + static speed ( no fan )
6)
Static speed it’s mean no fan speed and post –heat function is not active.
Pre-heat
1) AUX2(Cold water free contact) is always off.
2) If Ti1(Chilled water coil temperature)<36 ºC [or depend from PR 06 setting ], indoor fan remains off.
Max Pre-heat time is 2 minutes. If Til could not reach 36 ºC [or depend from PR 06 setting ]for 40
minutes(or PR12 setting), LCD would display error code: E5.
3) If Ti1(Chilled water coil temperature)>=36 ºC [depend from PR 06 setting ] for 2 minutes, or Til>=75
ºC, indoor fan runs at set speed.
4) If indoor coil temperature sensor is damaged, pre-heat time is set for 2 minutes and indoor fan runs at
set speed. Display Flash
E2 Alarm
Post-heat
For 2 pipes without valve version, unit would work without Post-heat function.
Over heat protection of indoor coil
1) If Ti1(Chilled water coil temperature exchanger temperature) >= 75 ºC for continual 5 seconds,
AUX1(Hot water free contact) is turned off, indoor fan remains on and runs at high speed.
2) Command on board display Eb/Wired wall pad display E11..
3) If Ti1(Chilled water coil temperature exchanger temperature)<70 ºC for continual 5 seconds,
AUX1(Hot water free contact) is turned on, indoor fan remains and runs at set speed.
4) If indoor coil temperature sensor is damaged, the protection mode will become obsolete and the unit
will work as the Pre-heat program.