Heat pump system and control system

A control system comprising:

• a server;
• a heat pump apparatus configured to adjust a temperature of a substance;
• a communication device configured to communicate with the server to receive from the server, a signal including an operation signal regarding an operation of the heat pump apparatus;
• an input device configured to input an instruction for the heat pump apparatus;
• and
• a controller configured to causes the heat pump apparatus to perform a first operation based on the operation signal without causing the heat pump apparatus to perform a second operation based on the instruction input to the input device, while the communication device is receiving the subsequent signal before a predetermined first time period elapses from time at which the communication device receives the signal,
• wherein the controller is configured to cause, when the communication device does not receive the signal for the predetermined first time period or longer, the heat pump apparatus to perform the second operation based on the instruction input to the input device.