MTA HAST 080 N User Manual

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HEAT PUMPS

MAINTENANCE AND OPERATING MANUAL

HAS T 070÷140

38178801085

Original instructions in Italian language

Table of Contents

Questions and Answers:

S
Suzanne McdonaldAug 9, 2025
Why is my MTA Heat Pump showing a high pressure error?
- B
  brownjimmyAug 9, 2025
  If your MTA Heat Pump is showing a high pressure error, several factors could be the cause. First, check the fans to ensure they are functioning correctly and rotating in the right direction; repair or replace them if needed, or invert two of the phase wires of the fan power supply. Secondly, prevent warm air from recirculating by repositioning the unit or removing any nearby obstructions. Also, inspect the coil for fouling and clean the condenser fins if necessary. Finally, ensure that the thermal load is within the prescribed limits.
P
Patricia HortonAug 16, 2025
How to troubleshoot an MTA HAST 080 N Heat Pump that fails to start?
- T
  Trevor JosephAug 16, 2025
  If your MTA Heat Pump unit fails to start, there are several possible reasons. First, check for any active shut-down alarms that might be preventing the unit from starting. If the unit is programmed to run by time band, activate start mode outside of those time bands in the User stage. Also, verify that supervision is not enabled by entering the supervision stage and disabling the supervision function. Finally, ensure that remote control is disabled to allow the unit to start.

MTA HAST 080 N Specifications

General

Cooling Capacity	8.0 kW
Heating Capacity	8.5 kW
Refrigerant	R410A
Type	Air to Water
Noise Level	52 dB

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