Service module for troubleshooting pumping unit

A service module for use with a motor of a pumping unit operating on a pipeline and a high pressure shutoff sensor for initiating shut down of the motor if pressure in the pipeline exceeds a prescribed threshold, the motor having an ignition arranged to produce a spark by rotation of a crankshaft of the motor, the service module comprising:

• an auxiliary switch which is arranged to be operatively coupled with the high pressure shutoff sensor and the motor so as to be operable between a first normal operating mode in which the auxiliary switch enables the high pressure shutoff sensor to shut down the motor and a second troubleshooting mode in which the auxiliary switch prevents the high pressure shutoff sensor from shutting down the motor while the high pressure shutoff sensor remains operatively coupled to the motor through the service module;
• a controller coupled to the auxiliary switch so as to operate the auxiliary switch between the first normal operating mode and the second troubleshooting mode;
• the controller defining a prescribed time interval for the auxiliary switch and being arranged to automatically displace the auxiliary switch from the second troubleshooting mode to the first normal operating mode upon expiry of the prescribed time interval subsequent to activation of the auxiliary switch from the first normal operating mode to the second troubleshooting mode.