andrews CWH 30/201, Operating Instructions Manual

Page: 43 / 48

Engineer 43 MAXXfl o EVO
4.5 COMPLETE PARAMETER LIST TABLE (CONTINUED)
PARAMETER DESCRIPTION FACTORY
DEFAULT
NOTES
Input/output test
7700 Relay test No test Used to test the outputs of the heater control PCB (QX2 is the
internal heat exchanger pump) or the outputs of the AGU2.5
expansion module
7713 Output test P1 0% Used to test internal pump speed control. Set the pump speed
(min - 100%) to test output
7714 PWM output P1 --- Displays the PWM output signal of P1 (QX2 internal pump)
7750 DHW temperature B3 --- Current temperature of the DHW tank
7760 Boiler temp B2 --- Current internal primary fl ow temperature B2
7820 Sensor temperature BX1 --- Flue gas temperature
7821 Sensor temperature BX2 --- Not used
7822 Sensor temperature BX3 --- Return circulation temperature sensor
7823 Sensor temperature BX4 --- Not used
7830 Sensor temperature BX21
module 1 --- User defi ned sensor
7831 Sensor temperature BX22
module 1 --- User defi ned sensor
7845 Voltage signal H2
module 1 --- Measured voltage of user defi ned input
7846 Contact state H2
module 1 --- Contact state of user defi ned input
7854 Voltage signal H3 --- Voltage signal from pressure transducer (90 & 120 models
only)
7855 Contact state H3 --- Not used by pressure transducer
7862 Frequency H4 --- Not used
7860 Contact state H4 --- Not used
7865 Contact state H5 --- Not used
7872 Contact state H6 --- Operation switch contact state
7874 Contact state H7 --- Air pressure switch contact state
Status
8003 Status DHW --- Current operational status of DHW
8005 State boiler --- Current operational status of boiler
8009 State burner --- Current operation status of gas burner
Diagnostics cascade
8100 - 8131 Priority & status producers
1 to 16 --- Current status of all heat engines being controlled by the
MAXXfl o EVO e.g. When in operation up to two producers will
have the status “Released for DHW operation”
8138 - 8150 Cascade temperatures --- Values of temperature sensors used in the cascade control