The low pressure alarm appears on the display when the low pressure switch contact opens due to drop in suction pressure at the inlet of the compressor.
If the inlet water sensor signal is lost this alarm will be displayed.
If the outlet water sensor signal is lost this alarm will be displayed.
This alarm is displayed when the outlet water temperature reaches three (3) degrees C. The pre-alarm condition is removed when the outlet temperature rises above a calculated setpoint algorithm. A three second startup delay is initiated when the outlet temperature is reached.
This warning is appears when the force gas probe is not detected due to poor connections or failure of probe.
SGP probe exceeds threshold set in parameter. Factory set temperature default is 125 deg. C. (257 deg. F.) . The compressor discharge temperature is to high, check refrigerant charge, TXV, superheat and operating limits.
Heat pump error when delivery pressure transducer signal is absent. Check wire to transducer and transducer. Also active if DCPx is not set correctly.
High pressure transducer detects high delivery pressure above 40 deg. C. (104 deg. F.).
Heat pump error when defrost transducer signal is absent. Check wire to transducer and defrost transducer.
Heat pump error when transducer signal is absent. Check wire to transducer and suction transducer.
Indicate low pressure below 4 bar ( 58 psig. ) in cooling mode or 2 bar (29 psig. ) in heating mode. Pre-alarm will reset when pressure exceeds set point by 2 bar (29 psig.) The low pressure alarm is bypassed for 3 seconds in heating mode and permanently bypassed from reverse cycle …
The Moducontrol checks the performance of the compressor performance once during the cycle. Performance is measured at 40 seconds from the start of the compressor. Parameter can be turned off by using #4 dipswitch on Moducontrol.
The Moducontrol indicates a tripped breaker (MTP) in the pump circuit. Check pump. Function deleted after version 3.6.
This error/alarm is not used anymore. The error occurs whenever the high pressure / capacity control transducer indicates a high pressure event. After five (5) prealarms the Moducontrol will lockout the unit.
This error/alarm is not used anymore. The error occurs whenever the low pressure/capacity control transducer indicates a low pressure event. After five (5) prealarms the Moducontrol will lockout the unit.
The error occurs whenever the discharge temperature / capacity control transducer indicates an event. After five (5 ) prealarms the Moducontrol will lockout the unit.
The compressor is drawing to much current either in starting up or running. Check voltage and current flow. Check capacitors, soft starter, wiring, compressor windings and contactor contacts.
The compressor is running with extremely low current and may not have enough refrigerant. Check refrigerant charge, superheat, and subcooling. Check soft starter, capacitors, compressor windings, contactor, and wiring. Check voltage and amperage. Check condition of the condensing coil. Check for items limiting heat rejection.
The compressor is running with extremely low current and may not have enough refrigerant. Check refrigerant charge, superheat, and subcooling. Check soft starter, capacitors, compressor windings, contactor, and wiring. Check voltage and amperage. Check condition of the condensing coil. Check for items limiting heat rejection.
Check soft starter, capacitors, compressor windings, contactor, and wiring. Check voltage and amperage. Check condition of the condensing coil. Check for items limiting heat rejection. Check refrigerant levels.
Check all wiring and electrical components to compressor.
The reversing valve could be faulty or blocked. Check wiring and coil. Check valve to see if it is bypassing hot gas.
High temperature boiler water has entered the loop at a value above the set point entered into the moducontrol. See parameter H. Moducontrol will lock out system on the third occurrence.
The unit has gone into defrost without waiting for the correct time between defrosts to be completed. The capacity control threshold was terminated due to high discharge temperatures (130 deg. C.). This pre-alarm does not cause the system to stop and there is no limit to the number of interventions.
The DHW temperature probe has a fault. Check sensor and control wiring. This function is only active if parameter 8 = 4. Use password 30.
Alarm occurs if DCPX is present or unit is configured for heat pump mode. If an error exists with the outdoor temperature probe reading. Check wiring to sensor and sensor. Alarm occurs when DCPX and heat pump.
In order to reset an alarm you must push the red bell reset button until the small red alarm bell indicator disappears. Turning the unit disconnect or on off switch will not clear any alarms. Manual reset controls and breaker switches must be reset manually prior to using the reset button if tripped.
